What are the S-signature requirements for patent applications?

S-signatures, or electronic signatures, must meet specific requirements for patent applications:

• Inserted between forward slash marks (//).
• Include the signer’s name.
• Be reasonably specific to identify the signer.
• Be handwritten or a facsimile of a handwritten signature.

According to MPEP 402.03: ‘The signature must consist only of letters, or Arabic numerals, or both. The S-signature must be signed in permanent dark ink or its equivalent.’

To learn more:

• S-signature
• electronic signature
• patent application
• signature requirements