MPEP § 1701.01 — Office Personnel Not To Testify (Annotated Rules)

§1701.01 Office Personnel Not To Testify

USPTO MPEP version: BlueIron's Update: 2025-12-31

This page consolidates and annotates all enforceable requirements under MPEP § 1701.01, including statutory authority, regulatory rules, examiner guidance, and practice notes. It is provided as guidance, with links to the ground truth sources. This is information only, it is not legal advice.

Office Personnel Not To Testify

This section addresses Office Personnel Not To Testify. Primary authority: 35 U.S.C. 134, 35 U.S.C. 145, and 37 CFR 104.1. Contains: 5 requirements, 2 prohibitions, 1 guidance statement, 2 permissions, and 4 other statements.

Key Rules

Topic

Testimony Request Procedures

5 rules
StatutoryInformativeAlways
[mpep-1701-01-65be12c032de288d1b192b5a]
USPTO Employees Not to Testify Except as Specified
Note:
The USPTO policy prohibits its employees, including patent examiners, from testifying in legal proceedings unless specified conditions in 37 CFR Part 104, Subpart C are met.

It is the policy of the United States Patent and Trademark Office (USPTO) that its employees, including patent examiners, will not appear as witnesses or give testimony in legal proceedings, except under the conditions specified in 37 CFR Part 104, Subpart C. The definitions set forth in 37 CFR 104.1 and the exceptions in 37 CFR 104.21 are applicable to this section. Any employee who testifies contrary to this policy will be dismissed or removed.

Jump to MPEP Source · 37 CFR 104.1Testimony Request ProceduresUSPTO Employee Testimony
StatutoryInformativeAlways
[mpep-1701-01-a5dd62688bb19b0d250777c6]
Exceptions to Employee Testimony Policy
Note:
The USPTO allows certain exceptions for its employees to testify in legal proceedings as specified in 37 CFR Part 104, Subpart C.

It is the policy of the United States Patent and Trademark Office (USPTO) that its employees, including patent examiners, will not appear as witnesses or give testimony in legal proceedings, except under the conditions specified in 37 CFR Part 104, Subpart C. The definitions set forth in 37 CFR 104.1 and the exceptions in 37 CFR 104.21 are applicable to this section. Any employee who testifies contrary to this policy will be dismissed or removed.

Jump to MPEP Source · 37 CFR 104.1Testimony Request ProceduresUSPTO Employee Testimony
StatutoryRecommendedAlways
[mpep-1701-01-a7e7154db1c48b901b39b896]
Request for USPTO Employee Testimony Must Be Made 10 Working Days In Advance
Note:
A request for an employee of the USPTO to testify must be submitted to the Office of the General Counsel at least ten working days before the expected testimony date.

A request for testimony of an employee of the USPTO should be made to the Office of the USPTO General Counsel at least ten (10) working days prior to the date of the expected testimony.

Jump to MPEP SourceTestimony Request ProceduresUSPTO Employee Testimony
StatutoryProhibitedAlways
[mpep-1701-01-b17b970bac106b0d85efb8c8]
Employees Must Not Give Expert or Opinion Testimony
Note:
Employees are restricted to testifying about facts within their personal knowledge and cannot provide expert opinions, answer hypothetical questions, or disclose privileged information.

If an employee is authorized to testify, the employee will be limited to testifying about facts within the employee’s personal knowledge. Employees are prohibited from giving expert or opinion testimony. Likewise, employees are prohibited from answering hypothetical or speculative questions. Fischer & Porter Co. v. Corning Glass Works, 61 F.R.D. 321, 181 USPQ 329 (E.D. Pa. 1974). See also In re Mayewsky, 162 USPQ 86, 89 (E.D. Va. 1969) (deposition of an examiner must be restricted to relevant matters of fact and must avoid any hypothetical or speculative questions or conclusions based thereon); ShafferTool Works v. Joy Mfg. Co., 167 USPQ 170 (S.D. Tex. 1970) (deposition of examiner should be limited to matters of fact and must not go into hypothetical or speculative areas or the bases, reasons, mental processes, analyses, or conclusions of the examiner in acting upon a patent application). Employees will not be permitted to give testimony with respect to subject matter which is privileged. Several court decisions limit testimony with respect to quasi-judicial functions performed by employees. Those decisions include United States v. Morgan, 313 U.S. 409, 422 (1941) (improper to inquire into mental processes of quasi-judicial officer or to examine the manner and extent to which the officer considered an administrative record); Western Electric Co. v. Piezo Technology, Inc., 860 F.2d 428, 8 USPQ2d 1853 (Fed. Cir. 1988) (patent examiner may not be compelled to answer questions which probe the examiner’s technical knowledge of the subject matter of a patent); McCulloch Gas Processing Co. v. Department of Energy, 650 F.2d 1216, 1229 (Temp. Emer. Ct. App. 1981) (discovery of degree of expertise of individuals performing governmental functions not permitted); In re Nilssen, 851 F.2d 1401, 7 USPQ2d 1500 (Fed. Cir. 1988) (technical or scientific qualifications of examiners-in-chief are not legally relevant in appeal under 35 U.S.C. 134 since board members need not be skilled in the art to render obviousness decision); Lange v. Commissioner, 352 F. Supp. 116, 176 USPQ 162 (D.D.C. 1972) (technical qualifications of examiners-in-chief not relevant in 35 U.S.C. 145 action).

Jump to MPEP SourceTestimony Request ProceduresUSPTO Employee TestimonyCivil Action
StatutoryPermittedAlways
[mpep-1701-01-48984633520d4838ca98fc7a]
Employees Cannot Testify About Privileged Matters
Note:
Employees are prohibited from testifying about subject matter that is privileged during legal proceedings.

If an employee is authorized to testify, the employee will be limited to testifying about facts within the employee’s personal knowledge. Employees are prohibited from giving expert or opinion testimony. Likewise, employees are prohibited from answering hypothetical or speculative questions. Fischer & Porter Co. v. Corning Glass Works, 61 F.R.D. 321, 181 USPQ 329 (E.D. Pa. 1974). See also In re Mayewsky, 162 USPQ 86, 89 (E.D. Va. 1969) (deposition of an examiner must be restricted to relevant matters of fact and must avoid any hypothetical or speculative questions or conclusions based thereon); ShafferTool Works v. Joy Mfg. Co., 167 USPQ 170 (S.D. Tex. 1970) (deposition of examiner should be limited to matters of fact and must not go into hypothetical or speculative areas or the bases, reasons, mental processes, analyses, or conclusions of the examiner in acting upon a patent application). Employees will not be permitted to give testimony with respect to subject matter which is privileged. Several court decisions limit testimony with respect to quasi-judicial functions performed by employees. Those decisions include United States v. Morgan, 313 U.S. 409, 422 (1941) (improper to inquire into mental processes of quasi-judicial officer or to examine the manner and extent to which the officer considered an administrative record); Western Electric Co. v. Piezo Technology, Inc., 860 F.2d 428, 8 USPQ2d 1853 (Fed. Cir. 1988) (patent examiner may not be compelled to answer questions which probe the examiner’s technical knowledge of the subject matter of a patent); McCulloch Gas Processing Co. v. Department of Energy, 650 F.2d 1216, 1229 (Temp. Emer. Ct. App. 1981) (discovery of degree of expertise of individuals performing governmental functions not permitted); In re Nilssen, 851 F.2d 1401, 7 USPQ2d 1500 (Fed. Cir. 1988) (technical or scientific qualifications of examiners-in-chief are not legally relevant in appeal under 35 U.S.C. 134 since board members need not be skilled in the art to render obviousness decision); Lange v. Commissioner, 352 F. Supp. 116, 176 USPQ 162 (D.D.C. 1972) (technical qualifications of examiners-in-chief not relevant in 35 U.S.C. 145 action).

Jump to MPEP SourceTestimony Request ProceduresUSPTO Employee TestimonyCivil Action
Topic

Patent Examiner Testimony

4 rules
StatutoryRequiredAlways
[mpep-1701-01-fcf3b0a87a7f44a66c45e9ce]
Examiner Must Notify General Counsel on Subpoena
Note:
Patent examiners must immediately inform the USPTO General Counsel if they are asked to testify or receive a subpoena.

Whenever an employee of the USPTO, including a patent examiner, is asked to testify or receives a subpoena, the employee shall immediately notify the Office of the USPTO General Counsel. Inquiries requesting testimony shall be also referred immediately to the Office of the USPTO General Counsel.

Jump to MPEP SourcePatent Examiner TestimonyNotification RequirementsTestimony Request Procedures
StatutoryRequiredAlways
[mpep-1701-01-bce3db443bdf32f1a34d3505]
Testimony of USPTO Employees Must Comply With 37 CFR Part 104, Subpart C
Note:
Individuals seeking testimony from USPTO employees, including patent examiners, must adhere to the provisions outlined in 37 CFR Part 104, Subpart C.

Any individual desiring the testimony of an employee of the USPTO, including the testimony of a patent examiner or other quasi-judicial employee, must comply with the provisions of 37 CFR Part 104, Subpart C.

Jump to MPEP SourcePatent Examiner TestimonyTestimony Request ProceduresUSPTO Employee Testimony
StatutoryProhibitedAlways
[mpep-1701-01-8bd07deecdd83446290b489d]
Examiner Deposition Must Be Restricted to Relevant Facts
Note:
Employees, including examiners, may only testify about facts within their personal knowledge and must avoid hypothetical or speculative questions.

If an employee is authorized to testify, the employee will be limited to testifying about facts within the employee’s personal knowledge. Employees are prohibited from giving expert or opinion testimony. Likewise, employees are prohibited from answering hypothetical or speculative questions. Fischer & Porter Co. v. Corning Glass Works, 61 F.R.D. 321, 181 USPQ 329 (E.D. Pa. 1974). See also In re Mayewsky, 162 USPQ 86, 89 (E.D. Va. 1969) (deposition of an examiner must be restricted to relevant matters of fact and must avoid any hypothetical or speculative questions or conclusions based thereon); ShafferTool Works v. Joy Mfg. Co., 167 USPQ 170 (S.D. Tex. 1970) (deposition of examiner should be limited to matters of fact and must not go into hypothetical or speculative areas or the bases, reasons, mental processes, analyses, or conclusions of the examiner in acting upon a patent application). Employees will not be permitted to give testimony with respect to subject matter which is privileged. Several court decisions limit testimony with respect to quasi-judicial functions performed by employees. Those decisions include United States v. Morgan, 313 U.S. 409, 422 (1941) (improper to inquire into mental processes of quasi-judicial officer or to examine the manner and extent to which the officer considered an administrative record); Western Electric Co. v. Piezo Technology, Inc., 860 F.2d 428, 8 USPQ2d 1853 (Fed. Cir. 1988) (patent examiner may not be compelled to answer questions which probe the examiner’s technical knowledge of the subject matter of a patent); McCulloch Gas Processing Co. v. Department of Energy, 650 F.2d 1216, 1229 (Temp. Emer. Ct. App. 1981) (discovery of degree of expertise of individuals performing governmental functions not permitted); In re Nilssen, 851 F.2d 1401, 7 USPQ2d 1500 (Fed. Cir. 1988) (technical or scientific qualifications of examiners-in-chief are not legally relevant in appeal under 35 U.S.C. 134 since board members need not be skilled in the art to render obviousness decision); Lange v. Commissioner, 352 F. Supp. 116, 176 USPQ 162 (D.D.C. 1972) (technical qualifications of examiners-in-chief not relevant in 35 U.S.C. 145 action).

Jump to MPEP SourcePatent Examiner TestimonyCivil ActionJudicial Review of Board Decisions
StatutoryPermittedAlways
[mpep-1701-01-ad2ad024d228c5377d606f6f]
Employee Not to Testify About Mental Processes
Note:
An employee authorized to testify about their involvement in a USPTO proceeding cannot be questioned about the mental processes or expertise of a quasi-judicial official.
In view of the discussion above, if an employee is authorized to testify in connection with the employee’s involvement or assistance in a quasi-judicial proceeding which took place before the USPTO, the employee will not be permitted to give testimony in response to questions that the Office determines are impermissible. Impermissible questions include, but are not limited to, questions directed to discovering the mental processes or expertise of a quasi-judicial official, such as:
  • (A) Information about that employee’s:
    • (1) Background;
    • (2) Expertise;
    • (3) Qualifications to examine or otherwise consider a particular patent or trademark application;
    • (4) Usual practice or whether the employee followed a procedure set out in any Office manual of practice (including the MPEP or TMEP) in a particular case;
    • (5) Consultation with another Office employee;
    • (6) Understanding of:
      • (a) A patented invention, an invention sought to be patented, or patent application, patent, reexamination or interference file;
      • (b) Prior art;
      • (c) Registered subject matter, subject matter sought to be registered, or a trademark application, registration, opposition, cancellation, interference, or concurrent use file;
      • (d) Any Office manual of practice;
      • (e) Office regulations;
      • (f) Patent, trademark, or other law; or
      • (g) The responsibilities of another Office employee;
    • (7) Reliance on particular facts or arguments;
  • (B) To inquire into the manner in and extent to which the employee considered or studied material in performing a quasi-judicial function; or
  • (C) To inquire into the bases, reasons, mental processes, analyses, or conclusions of that Office employee in performing the quasi-judicial function.
Jump to MPEP SourcePatent Examiner TestimonyTestimony Request ProceduresUSPTO Employee Testimony
Topic

Notification Requirements

3 rules
StatutoryRequiredAlways
[mpep-1701-01-407d0fc354ba8af8db290b90]
Inquiries Requiring Testimony Must Be Refered to General Counsel
Note:
Whenever an employee of the USPTO is asked to testify, they must immediately notify the Office of the USPTO General Counsel.

Whenever an employee of the USPTO, including a patent examiner, is asked to testify or receives a subpoena, the employee shall immediately notify the Office of the USPTO General Counsel. Inquiries requesting testimony shall be also referred immediately to the Office of the USPTO General Counsel.

Jump to MPEP SourceNotification RequirementsTestimony Request ProceduresUSPTO Employee Testimony
StatutoryRequiredAlways
[mpep-1701-01-054b5de10949adafa7b03e0d]
Requirement for Written Testimony Requests to USPTO General Counsel
Note:
All requests for testimony must be in writing and comply with 37 CFR 104.22(c), including identifying the civil action, agreeing not to ask precluded questions, giving notice, and supplying a transcript.
Any request for testimony addressed or delivered to the Office of the USPTO General Counsel shall comply with 37 CFR 104.22(c). All requests must be in writing. The need for a subpoena may be obviated where the request complies with 37 CFR 104.22(c) if the party requesting the testimony further meets the following conditions:
  • (A) The party requesting the testimony identifies the civil action or other legal proceeding for which the testimony is being taken. The identification shall include the:
    • (1) Style of the case;
    • (2) Civil action number;
    • (3) District in which the civil action is pending;
    • (4) Judge assigned to the case; and
    • (5) Name, address, and telephone number of counsel for all parties in the civil action.
  • (B) The party agrees not to ask questions seeking information which is precluded by 37 CFR 104.23;
  • (C) The party shall comply with applicable provisions of the Federal Rules of Civil Procedure, including Rule 30, and give ten (10) working days notice to the Office of the USPTO General Counsel prior to the date a deposition is desired. Fifteen (15) working days notice is required for any deposition which is desired to be taken between November 15 and January 15;
  • (D) The party agrees to notice the deposition at a place convenient to the USPTO. The Conference Room in the Office of the USPTO General Counsel is deemed to be a place convenient to the Office; and
  • (E) The party agrees to supply a copy of the transcript of the deposition to the USPTO for its records.
Jump to MPEP Source · 37 CFR 104.22(c)Notification RequirementsTestimony Request ProceduresUSPTO Employee Testimony
StatutoryRequiredAlways
[mpep-1701-01-f682aa44ea5fb383dbac5f8d]
Deposition Requires Subpoena Without Written Agreement
Note:
A party must obtain a subpoena before a deposition can be held if there is no written agreement meeting specified conditions.

Absent a written agreement meeting the conditions specified in paragraphs (A) through (E), a party must comply with the precise terms of 37 CFR 104.22(c) and the USPTO will not permit a deposition without issuance of a subpoena.

Jump to MPEP Source · 37 CFR 104.22(c)Notification RequirementsTestimony Request ProceduresSettlement of Contested Case
Topic

USPTO Employee Testimony

2 rules
StatutoryInformativeAlways
[mpep-1701-01-12c0481171eec0421e92fd2d]
USPTO Employee Testimony Prohibited
Note:
Employees are not to testify in legal proceedings unless specified conditions are met. Violation results in dismissal or removal.

It is the policy of the United States Patent and Trademark Office (USPTO) that its employees, including patent examiners, will not appear as witnesses or give testimony in legal proceedings, except under the conditions specified in 37 CFR Part 104, Subpart C. The definitions set forth in 37 CFR 104.1 and the exceptions in 37 CFR 104.21 are applicable to this section. Any employee who testifies contrary to this policy will be dismissed or removed.

Jump to MPEP Source · 37 CFR 104.1USPTO Employee TestimonyTestimony Request Procedures
StatutoryInformativeAlways
[mpep-1701-01-6137621a5a92570c43b2a013]
Employee Must Testify Only on Personal Knowledge
Note:
An employee authorized to testify can only provide factual information within their personal knowledge and not give expert opinions or answer hypothetical questions.

If an employee is authorized to testify, the employee will be limited to testifying about facts within the employee’s personal knowledge. Employees are prohibited from giving expert or opinion testimony. Likewise, employees are prohibited from answering hypothetical or speculative questions. Fischer & Porter Co. v. Corning Glass Works, 61 F.R.D. 321, 181 USPQ 329 (E.D. Pa. 1974). See also In re Mayewsky, 162 USPQ 86, 89 (E.D. Va. 1969) (deposition of an examiner must be restricted to relevant matters of fact and must avoid any hypothetical or speculative questions or conclusions based thereon); ShafferTool Works v. Joy Mfg. Co., 167 USPQ 170 (S.D. Tex. 1970) (deposition of examiner should be limited to matters of fact and must not go into hypothetical or speculative areas or the bases, reasons, mental processes, analyses, or conclusions of the examiner in acting upon a patent application). Employees will not be permitted to give testimony with respect to subject matter which is privileged. Several court decisions limit testimony with respect to quasi-judicial functions performed by employees. Those decisions include United States v. Morgan, 313 U.S. 409, 422 (1941) (improper to inquire into mental processes of quasi-judicial officer or to examine the manner and extent to which the officer considered an administrative record); Western Electric Co. v. Piezo Technology, Inc., 860 F.2d 428, 8 USPQ2d 1853 (Fed. Cir. 1988) (patent examiner may not be compelled to answer questions which probe the examiner’s technical knowledge of the subject matter of a patent); McCulloch Gas Processing Co. v. Department of Energy, 650 F.2d 1216, 1229 (Temp. Emer. Ct. App. 1981) (discovery of degree of expertise of individuals performing governmental functions not permitted); In re Nilssen, 851 F.2d 1401, 7 USPQ2d 1500 (Fed. Cir. 1988) (technical or scientific qualifications of examiners-in-chief are not legally relevant in appeal under 35 U.S.C. 134 since board members need not be skilled in the art to render obviousness decision); Lange v. Commissioner, 352 F. Supp. 116, 176 USPQ 162 (D.D.C. 1972) (technical qualifications of examiners-in-chief not relevant in 35 U.S.C. 145 action).

Jump to MPEP SourceUSPTO Employee TestimonyCivil ActionJudicial Review of Board Decisions
Topic

Civil Action

2 rules
StatutoryProhibitedAlways
[mpep-1701-01-9c016134538b85b230c85edd]
Employees Prohibited from Answering Hypothetical Questions
Note:
Employees are not allowed to respond to questions that are hypothetical or speculative during testimony.

If an employee is authorized to testify, the employee will be limited to testifying about facts within the employee’s personal knowledge. Employees are prohibited from giving expert or opinion testimony. Likewise, employees are prohibited from answering hypothetical or speculative questions. Fischer & Porter Co. v. Corning Glass Works, 61 F.R.D. 321, 181 USPQ 329 (E.D. Pa. 1974). See also In re Mayewsky, 162 USPQ 86, 89 (E.D. Va. 1969) (deposition of an examiner must be restricted to relevant matters of fact and must avoid any hypothetical or speculative questions or conclusions based thereon); ShafferTool Works v. Joy Mfg. Co., 167 USPQ 170 (S.D. Tex. 1970) (deposition of examiner should be limited to matters of fact and must not go into hypothetical or speculative areas or the bases, reasons, mental processes, analyses, or conclusions of the examiner in acting upon a patent application). Employees will not be permitted to give testimony with respect to subject matter which is privileged. Several court decisions limit testimony with respect to quasi-judicial functions performed by employees. Those decisions include United States v. Morgan, 313 U.S. 409, 422 (1941) (improper to inquire into mental processes of quasi-judicial officer or to examine the manner and extent to which the officer considered an administrative record); Western Electric Co. v. Piezo Technology, Inc., 860 F.2d 428, 8 USPQ2d 1853 (Fed. Cir. 1988) (patent examiner may not be compelled to answer questions which probe the examiner’s technical knowledge of the subject matter of a patent); McCulloch Gas Processing Co. v. Department of Energy, 650 F.2d 1216, 1229 (Temp. Emer. Ct. App. 1981) (discovery of degree of expertise of individuals performing governmental functions not permitted); In re Nilssen, 851 F.2d 1401, 7 USPQ2d 1500 (Fed. Cir. 1988) (technical or scientific qualifications of examiners-in-chief are not legally relevant in appeal under 35 U.S.C. 134 since board members need not be skilled in the art to render obviousness decision); Lange v. Commissioner, 352 F. Supp. 116, 176 USPQ 162 (D.D.C. 1972) (technical qualifications of examiners-in-chief not relevant in 35 U.S.C. 145 action).

Jump to MPEP SourceCivil ActionJudicial Review of Board DecisionsPatent Examiner Testimony
StatutoryProhibitedAlways
[mpep-1701-01-445ca2a6ecf2933076c02950]
Examiner Technical Qualifications Not Relevant in Appeals
Note:
The technical qualifications of patent examiners are not relevant when appealed under specific U.S. laws, as determined by several court decisions.

If an employee is authorized to testify, the employee will be limited to testifying about facts within the employee’s personal knowledge. Employees are prohibited from giving expert or opinion testimony. Likewise, employees are prohibited from answering hypothetical or speculative questions. Fischer & Porter Co. v. Corning Glass Works, 61 F.R.D. 321, 181 USPQ 329 (E.D. Pa. 1974). See also In re Mayewsky, 162 USPQ 86, 89 (E.D. Va. 1969) (deposition of an examiner must be restricted to relevant matters of fact and must avoid any hypothetical or speculative questions or conclusions based thereon); ShafferTool Works v. Joy Mfg. Co., 167 USPQ 170 (S.D. Tex. 1970) (deposition of examiner should be limited to matters of fact and must not go into hypothetical or speculative areas or the bases, reasons, mental processes, analyses, or conclusions of the examiner in acting upon a patent application). Employees will not be permitted to give testimony with respect to subject matter which is privileged. Several court decisions limit testimony with respect to quasi-judicial functions performed by employees. Those decisions include United States v. Morgan, 313 U.S. 409, 422 (1941) (improper to inquire into mental processes of quasi-judicial officer or to examine the manner and extent to which the officer considered an administrative record); Western Electric Co. v. Piezo Technology, Inc., 860 F.2d 428, 8 USPQ2d 1853 (Fed. Cir. 1988) (patent examiner may not be compelled to answer questions which probe the examiner’s technical knowledge of the subject matter of a patent); McCulloch Gas Processing Co. v. Department of Energy, 650 F.2d 1216, 1229 (Temp. Emer. Ct. App. 1981) (discovery of degree of expertise of individuals performing governmental functions not permitted); In re Nilssen, 851 F.2d 1401, 7 USPQ2d 1500 (Fed. Cir. 1988) (technical or scientific qualifications of examiners-in-chief are not legally relevant in appeal under 35 U.S.C. 134 since board members need not be skilled in the art to render obviousness decision); Lange v. Commissioner, 352 F. Supp. 116, 176 USPQ 162 (D.D.C. 1972) (technical qualifications of examiners-in-chief not relevant in 35 U.S.C. 145 action).

Jump to MPEP SourceCivil ActionJudicial Review of Board DecisionsPatent Examiner Testimony
Topic

Judicial Review of Board Decisions

1 rules
StatutoryInformativeAlways
[mpep-1701-01-e86a1e16c1d0f380039dc538]
Employees Cannot Testify About Quasi-Judicial Actions
Note:
Employees are prohibited from testifying about their quasi-judicial functions, such as decision-making processes or expert opinions.

If an employee is authorized to testify, the employee will be limited to testifying about facts within the employee’s personal knowledge. Employees are prohibited from giving expert or opinion testimony. Likewise, employees are prohibited from answering hypothetical or speculative questions. Fischer & Porter Co. v. Corning Glass Works, 61 F.R.D. 321, 181 USPQ 329 (E.D. Pa. 1974). See also In re Mayewsky, 162 USPQ 86, 89 (E.D. Va. 1969) (deposition of an examiner must be restricted to relevant matters of fact and must avoid any hypothetical or speculative questions or conclusions based thereon); ShafferTool Works v. Joy Mfg. Co., 167 USPQ 170 (S.D. Tex. 1970) (deposition of examiner should be limited to matters of fact and must not go into hypothetical or speculative areas or the bases, reasons, mental processes, analyses, or conclusions of the examiner in acting upon a patent application). Employees will not be permitted to give testimony with respect to subject matter which is privileged. Several court decisions limit testimony with respect to quasi-judicial functions performed by employees. Those decisions include United States v. Morgan, 313 U.S. 409, 422 (1941) (improper to inquire into mental processes of quasi-judicial officer or to examine the manner and extent to which the officer considered an administrative record); Western Electric Co. v. Piezo Technology, Inc., 860 F.2d 428, 8 USPQ2d 1853 (Fed. Cir. 1988) (patent examiner may not be compelled to answer questions which probe the examiner’s technical knowledge of the subject matter of a patent); McCulloch Gas Processing Co. v. Department of Energy, 650 F.2d 1216, 1229 (Temp. Emer. Ct. App. 1981) (discovery of degree of expertise of individuals performing governmental functions not permitted); In re Nilssen, 851 F.2d 1401, 7 USPQ2d 1500 (Fed. Cir. 1988) (technical or scientific qualifications of examiners-in-chief are not legally relevant in appeal under 35 U.S.C. 134 since board members need not be skilled in the art to render obviousness decision); Lange v. Commissioner, 352 F. Supp. 116, 176 USPQ 162 (D.D.C. 1972) (technical qualifications of examiners-in-chief not relevant in 35 U.S.C. 145 action).

Jump to MPEP SourceJudicial Review of Board DecisionsPatent Examiner TestimonyTestimony Request Procedures

Citations

Primary topicCitation
Civil Action
Judicial Review of Board Decisions
Patent Examiner Testimony
Testimony Request Procedures
USPTO Employee Testimony
35 U.S.C. § 134
Civil Action
Judicial Review of Board Decisions
Patent Examiner Testimony
Testimony Request Procedures
USPTO Employee Testimony
35 U.S.C. § 145
Testimony Request Procedures
USPTO Employee Testimony
37 CFR § 104.1
Testimony Request Procedures
USPTO Employee Testimony
37 CFR § 104.21
Notification Requirements37 CFR § 104.22(c)
Notification Requirements37 CFR § 104.23
Civil Action
Judicial Review of Board Decisions
Patent Examiner Testimony
Testimony Request Procedures
USPTO Employee Testimony
In re Mayewsky, 162 USPQ 86, 89 (E.D. Va. 1969)
Civil Action
Judicial Review of Board Decisions
Patent Examiner Testimony
Testimony Request Procedures
USPTO Employee Testimony
In re Nilssen, 851 F.2d 1401, 7 USPQ2d 1500 (Fed. Cir. 1988)
Civil Action
Judicial Review of Board Decisions
Patent Examiner Testimony
Testimony Request Procedures
USPTO Employee Testimony
Lange v. Commissioner, 352 F. Supp. 116, 176 USPQ 162 (D.D.C. 1972)
Civil Action
Judicial Review of Board Decisions
Patent Examiner Testimony
Testimony Request Procedures
USPTO Employee Testimony
Those decisions include United States v. Morgan, 313 U.S. 409, 422 (1941)
Civil Action
Judicial Review of Board Decisions
Patent Examiner Testimony
Testimony Request Procedures
USPTO Employee Testimony
Western Electric Co. v. Piezo Technology, Inc., 860 F.2d 428, 8 USPQ2d 1853 (Fed. Cir. 1988)

Source Text from USPTO’s MPEP

This is an exact copy of the MPEP from the USPTO. It is here for your reference to see the section in context.

BlueIron Last Updated: 2025-12-31