[Code of Federal Regulations] [Title 37, Volume 1] [Revised as of July 1, 2008] From the U.S. Government Printing Office via GPO Access [CITE: 37CFR1.31] [Page 40] TITLE 37--PATENTS, TRADEMARKS, AND COPYRIGHTS CHAPTER I--UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE PART 1_RULES OF PRACTICE IN PATENT CASES--Table of Contents Subpart B_National Processing Provisions Sec. 1.31 Applicant may be represented by one or more patent practitioners or joint inventors. Prosecution of Application and Appointment of Attorney or Agent An applicant for patent may file and prosecute his or her own case, or he or she may give a power of attorney so as to be represented by one or more patent practitioners or joint inventors. The United States Patent and Trademark Office cannot aid in the selection of a patent practitioner. [70 FR 56127, Sept. 26, 2005]