MPEP § 2125 — Drawings as Prior Art (Annotated Rules)

§2125 Drawings as Prior Art

USPTO MPEP version: BlueIron's Update: 2026-01-10

This page consolidates and annotates all enforceable requirements under MPEP § 2125, 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.

Drawings as Prior Art

This section addresses Drawings as Prior Art. Contains: 2 requirements, 1 prohibition, 1 permission, and 5 other statements.

Key Rules

Topic

Drawings

5 rules
MPEP GuidanceInformativeAlways
[mpep-2125-0c0d8ce972fec3790f1b757a]
Drawing Origin Is Irrelevant
Note:
Drawings in patents can anticipate claims regardless of their origin, as long as they show all claimed structural features.

Drawings and pictures can anticipate claims if they clearly show the structure which is claimed. In re Mraz, 455 F.2d 1069, 173 USPQ 25 (CCPA 1972). However, the picture must show all the claimed structural features and how they are put together. Jockmus v. Leviton, 28 F.2d 812 (2d Cir. 1928). The origin of the drawing is immaterial. For instance, drawings in a design patent can anticipate or make obvious the claimed invention as can drawings in utility patents. When the reference is a utility patent, it does not matter that the feature shown is unintended or unexplained in the specification. The drawings must be evaluated for what they reasonably disclose and suggest to one of ordinary skill in the art. In re Aslanian, 590 F.2d 911, 200 USPQ 500 (CCPA 1979). See MPEP § 2121.04 for more information on prior art drawings as “enabled disclosures.”

Jump to MPEP SourcePrior Art for DesignsRequired Drawing Content
MPEP GuidanceInformativeAlways
[mpep-2125-94e864f89df7863a64a1998b]
Drawings Not to Scale Require Caution in Measurement Arguments
Note:
When drawings are not indicated as to scale and dimensions are not specified, arguments based on measured features have limited value.

When the reference does not disclose that the drawings are to scale and is silent as to dimensions, arguments based on measurement of the drawing features are of little value. See Hockerson-Halberstadt, Inc. v. Avia Group Int’l, 222 F.3d 951, 956, 55 USPQ2d 1487, 1491 (Fed. Cir. 2000) (The disclosure gave no indication that the drawings were drawn to scale. “[I]t is well established that patent drawings do not define the precise proportions of the elements and may not be relied on to show particular sizes if the specification is completely silent on the issue.”). However, the description of the article pictured can be relied on, in combination with the drawings, for what they would reasonably teach one of ordinary skill in the art. In re Wright, 569 F.2d 1124, 1127-28, 193 USPQ 332, 335-36 (CCPA 1977) (“We disagree with the Solicitor’s conclusion, reached by a comparison of the relative dimensions of appellant’s and Bauer’s [the reference’s] drawing figures, that Bauer ‘clearly points to the use of a chime length of roughly 1/2 to 1 inch for a whiskey barrel.’ This ignores the fact that Bauer does not disclose that his drawings are to scale…. However, we agree with the Solicitor that Bauer’s teaching that whiskey losses are influenced by the distance the liquor needs to ‘traverse the pores of the wood’ (albeit in reference to the thickness of the barrelhead)” would have suggested the desirability of an increased chime length to one of ordinary skill in the art bent on further reducing whiskey losses.” 569 F.2d at 1127, 193 USPQ at 335-36.)

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MPEP GuidanceInformativeAlways
[mpep-2125-5e5822a776ede0300e518e19]
Drawings Not to Scale Require Caution
Note:
When drawings do not indicate scale, arguments based on their measurements are unreliable without additional specification details.

When the reference does not disclose that the drawings are to scale and is silent as to dimensions, arguments based on measurement of the drawing features are of little value. See Hockerson-Halberstadt, Inc. v. Avia Group Int’l, 222 F.3d 951, 956, 55 USPQ2d 1487, 1491 (Fed. Cir. 2000) (The disclosure gave no indication that the drawings were drawn to scale. “[I]t is well established that patent drawings do not define the precise proportions of the elements and may not be relied on to show particular sizes if the specification is completely silent on the issue.”). However, the description of the article pictured can be relied on, in combination with the drawings, for what they would reasonably teach one of ordinary skill in the art. In re Wright, 569 F.2d 1124, 1127-28, 193 USPQ 332, 335-36 (CCPA 1977) (“We disagree with the Solicitor’s conclusion, reached by a comparison of the relative dimensions of appellant’s and Bauer’s [the reference’s] drawing figures, that Bauer ‘clearly points to the use of a chime length of roughly 1/2 to 1 inch for a whiskey barrel.’ This ignores the fact that Bauer does not disclose that his drawings are to scale…. However, we agree with the Solicitor that Bauer’s teaching that whiskey losses are influenced by the distance the liquor needs to ‘traverse the pores of the wood’ (albeit in reference to the thickness of the barrelhead)” would have suggested the desirability of an increased chime length to one of ordinary skill in the art bent on further reducing whiskey losses.” 569 F.2d at 1127, 193 USPQ at 335-36.)

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MPEP GuidanceProhibitedAlways
[mpep-2125-01968b704e5babc21c913b37]
Drawings Do Not Define Precise Proportions Without Specification
Note:
Patent drawings cannot be used to show specific sizes if the specification does not mention them, but descriptions can provide reasonable teachings when combined with drawings.

When the reference does not disclose that the drawings are to scale and is silent as to dimensions, arguments based on measurement of the drawing features are of little value. See Hockerson-Halberstadt, Inc. v. Avia Group Int’l, 222 F.3d 951, 956, 55 USPQ2d 1487, 1491 (Fed. Cir. 2000) (The disclosure gave no indication that the drawings were drawn to scale. “[I]t is well established that patent drawings do not define the precise proportions of the elements and may not be relied on to show particular sizes if the specification is completely silent on the issue.”). However, the description of the article pictured can be relied on, in combination with the drawings, for what they would reasonably teach one of ordinary skill in the art. In re Wright, 569 F.2d 1124, 1127-28, 193 USPQ 332, 335-36 (CCPA 1977) (“We disagree with the Solicitor’s conclusion, reached by a comparison of the relative dimensions of appellant’s and Bauer’s [the reference’s] drawing figures, that Bauer ‘clearly points to the use of a chime length of roughly 1/2 to 1 inch for a whiskey barrel.’ This ignores the fact that Bauer does not disclose that his drawings are to scale…. However, we agree with the Solicitor that Bauer’s teaching that whiskey losses are influenced by the distance the liquor needs to ‘traverse the pores of the wood’ (albeit in reference to the thickness of the barrelhead)” would have suggested the desirability of an increased chime length to one of ordinary skill in the art bent on further reducing whiskey losses.” 569 F.2d at 1127, 193 USPQ at 335-36.)

Jump to MPEP SourceEx Parte Appeals to PTABPatent Application Content
MPEP GuidanceInformativeAlways
[mpep-2125-e5a90bd6f5597887ee375da1]
Drawings Not to Scale Require Description for Size Determination
Note:
When drawings are not indicated as to scale, the description must be relied upon to determine specific sizes of elements in the invention.

When the reference does not disclose that the drawings are to scale and is silent as to dimensions, arguments based on measurement of the drawing features are of little value. See Hockerson-Halberstadt, Inc. v. Avia Group Int’l, 222 F.3d 951, 956, 55 USPQ2d 1487, 1491 (Fed. Cir. 2000) (The disclosure gave no indication that the drawings were drawn to scale. “[I]t is well established that patent drawings do not define the precise proportions of the elements and may not be relied on to show particular sizes if the specification is completely silent on the issue.”). However, the description of the article pictured can be relied on, in combination with the drawings, for what they would reasonably teach one of ordinary skill in the art. In re Wright, 569 F.2d 1124, 1127-28, 193 USPQ 332, 335-36 (CCPA 1977) (“We disagree with the Solicitor’s conclusion, reached by a comparison of the relative dimensions of appellant’s and Bauer’s [the reference’s] drawing figures, that Bauer ‘clearly points to the use of a chime length of roughly 1/2 to 1 inch for a whiskey barrel.’ This ignores the fact that Bauer does not disclose that his drawings are to scale…. However, we agree with the Solicitor that Bauer’s teaching that whiskey losses are influenced by the distance the liquor needs to ‘traverse the pores of the wood’ (albeit in reference to the thickness of the barrelhead)” would have suggested the desirability of an increased chime length to one of ordinary skill in the art bent on further reducing whiskey losses.” 569 F.2d at 1127, 193 USPQ at 335-36.)

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Topic

Required Drawing Content

2 rules
MPEP GuidanceRequiredAlways
[mpep-2125-f34221baafb67b98bb9376f9]
Drawings Must Show All Claimed Features
Note:
Patent drawings must clearly depict all structural features claimed and how they are assembled, as determined by what a skilled artisan would reasonably infer from the drawings.

Drawings and pictures can anticipate claims if they clearly show the structure which is claimed. In re Mraz, 455 F.2d 1069, 173 USPQ 25 (CCPA 1972). However, the picture must show all the claimed structural features and how they are put together. Jockmus v. Leviton, 28 F.2d 812 (2d Cir. 1928). The origin of the drawing is immaterial. For instance, drawings in a design patent can anticipate or make obvious the claimed invention as can drawings in utility patents. When the reference is a utility patent, it does not matter that the feature shown is unintended or unexplained in the specification. The drawings must be evaluated for what they reasonably disclose and suggest to one of ordinary skill in the art. In re Aslanian, 590 F.2d 911, 200 USPQ 500 (CCPA 1979). See MPEP § 2121.04 for more information on prior art drawings as “enabled disclosures.”

Jump to MPEP SourceRequired Drawing ContentAnticipation/NoveltyPrior Art for Designs
MPEP GuidanceRequiredAlways
[mpep-2125-b50a8118a6c0881f4fc16c98]
Drawings Must Reasonably Disclose Invention
Note:
Patent drawings must show all claimed structural features and be interpreted by one of ordinary skill in the art to reasonably disclose the invention.

Drawings and pictures can anticipate claims if they clearly show the structure which is claimed. In re Mraz, 455 F.2d 1069, 173 USPQ 25 (CCPA 1972). However, the picture must show all the claimed structural features and how they are put together. Jockmus v. Leviton, 28 F.2d 812 (2d Cir. 1928). The origin of the drawing is immaterial. For instance, drawings in a design patent can anticipate or make obvious the claimed invention as can drawings in utility patents. When the reference is a utility patent, it does not matter that the feature shown is unintended or unexplained in the specification. The drawings must be evaluated for what they reasonably disclose and suggest to one of ordinary skill in the art. In re Aslanian, 590 F.2d 911, 200 USPQ 500 (CCPA 1979). See MPEP § 2121.04 for more information on prior art drawings as “enabled disclosures.”

Jump to MPEP SourceRequired Drawing ContentDesign NoveltyPrior Art for Designs
Topic

Prior Art for Designs

2 rules
MPEP GuidancePermittedAlways
[mpep-2125-2d49ae5abd978188cdaca6f7]
Drawings Can Anticipate Utility Claims
Note:
Drawings in design patents can show the structure of claimed inventions, making them relevant to utility patent claims.

Drawings and pictures can anticipate claims if they clearly show the structure which is claimed. In re Mraz, 455 F.2d 1069, 173 USPQ 25 (CCPA 1972). However, the picture must show all the claimed structural features and how they are put together. Jockmus v. Leviton, 28 F.2d 812 (2d Cir. 1928). The origin of the drawing is immaterial. For instance, drawings in a design patent can anticipate or make obvious the claimed invention as can drawings in utility patents. When the reference is a utility patent, it does not matter that the feature shown is unintended or unexplained in the specification. The drawings must be evaluated for what they reasonably disclose and suggest to one of ordinary skill in the art. In re Aslanian, 590 F.2d 911, 200 USPQ 500 (CCPA 1979). See MPEP § 2121.04 for more information on prior art drawings as “enabled disclosures.”

Jump to MPEP SourcePrior Art for DesignsAnticipation/NoveltyDesign Patent Practice
MPEP GuidanceInformativeAlways
[mpep-2125-db03f48bb523448e5ac74488]
Drawings Can Anticipate Unexplained Features in Utility Patents
Note:
When the reference is a utility patent, drawings can anticipate claims even if features are unintended or unexplained in the specification.

Drawings and pictures can anticipate claims if they clearly show the structure which is claimed. In re Mraz, 455 F.2d 1069, 173 USPQ 25 (CCPA 1972). However, the picture must show all the claimed structural features and how they are put together. Jockmus v. Leviton, 28 F.2d 812 (2d Cir. 1928). The origin of the drawing is immaterial. For instance, drawings in a design patent can anticipate or make obvious the claimed invention as can drawings in utility patents. When the reference is a utility patent, it does not matter that the feature shown is unintended or unexplained in the specification. The drawings must be evaluated for what they reasonably disclose and suggest to one of ordinary skill in the art. In re Aslanian, 590 F.2d 911, 200 USPQ 500 (CCPA 1979). See MPEP § 2121.04 for more information on prior art drawings as “enabled disclosures.”

Jump to MPEP SourcePrior Art for DesignsPatent Application ContentRequired Drawing Content

Citations

Primary topicCitation
Drawings
Prior Art for Designs
Required Drawing Content
MPEP § 2121.04
Drawings
Prior Art for Designs
Required Drawing Content
In re Aslanian, 590 F.2d 911, 200 USPQ 500 (CCPA 1979)
Drawings
Prior Art for Designs
Required Drawing Content
In re Mraz, 455 F.2d 1069, 173 USPQ 25 (CCPA 1972)

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: 2026-01-10