What are the signature requirements for correspondence in patent applications?

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Source: FAQ (MPEP-Based) BlueIron Update: 2024-09-09 10 Rules 5 Related FAQs This page is an FAQ based on guidance from the Manual of Patent Examining Procedure. It is provided as guidance, with links to the ground truth sources. This is information only: it is not legal advice. The signature requirements for correspondence in patent applications are outlined in MPEP 502.02 . The section states: 37 CFR 1.4(d) sets forth the signature requirements for correspondence filed in the Office. Specifically, 37 CFR 1.4(d) provides that: The signature requirements vary depending on the type of correspondence and the method of submission. Generally, they include: Handwritten signatures S-signatures (electronically created signatures) EFS-Web signatures for documents submitted via the Electronic Filing System Each type of signature has specific requirements to ensure its validity and authenticity. Related Rules from the Manual of Patent Examining Procedure 10 rules Collapse Handwritten Signature Requirement for Correspondence MPEP 502.02 Permitted Handwritten Signatures for Correspondence Allowed MPEP 502.02 Permitted Original Handwritten Signature Requirement MPEP 502.02 Correspondence Must Be Submitted via USPTO Electronic Filing System MPEP 502 Permitted Facsimile Transmissions for Correspondence Must Include Application Identifiers MPEP 502 Recommended Scanned Image of Handwritten Signature Permitted for USPTO Filing MPEP 502.02 Permitted All Handwritten Signatures Covered MPEP 502.02 Graphic Representation of Handwritten Signature Required for Filing MPEP 502.02 S-Signature and Handwritten Signatures Allowed for Filings MPEP 502.02 Permitted S-Signature Requirement for Correspondence MPEP 502.02 Other Related FAQs 5 FAQs Collapse What are the consequences of an improper signature on patent correspondence? What is an S-signature in USPTO correspondence and how is it formatted? What is an S-signature in patent correspondence? What are the signature requirements for patent pr...