What are the signature requirements for papers filed in a patent application?

According to 37 CFR 11.18(a), all documents filed in the USPTO for patent matters must bear a signature, with some exceptions:

  • Documents that are required to be signed by the applicant or party do not need a practitioner’s signature.
  • For all other documents, each piece of correspondence filed by a practitioner must be personally signed or have their signature inserted in compliance with 37 CFR 1.4(d).

The MPEP states: “37 CFR 11.18(a) emphasizes that every paper filed by a practitioner must be personally signed by the practitioner, except those required to be signed by the applicant or party.”

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Topics: MPEP 400 - Representative of Applicant or Owner, Patent Law, Patent Procedure