37 C.F.R. § 1.95 Copies of exhibits.
Title 37 - Patents, Trademarks, and Copyrights
Copies of models or other physical exhibits will not ordinarily be furnished by the Office, and any model or exhibit in an application or patent shall not be taken from the Office except in the custody of an employee of the Office specially authorized by the Director.
Title 37: Patents, Trademarks, and Copyrights
PART 1—RULES OF PRACTICE IN PATENT CASES
Subpart B—National Processing Provisions
Models, Exhibits, Specimens
§ 1.95 Copies of exhibits.