{"data":{"id":"us/37-cfr-42.61","jurisdiction":"us","citation":"37 CFR 42.61","heading":"Admissibility.","body":"(a) Evidence that is not taken, sought, or filed in accordance with this subpart is not admissible.\n(b) Records of the Office. Certification is not necessary as a condition to admissibility when the evidence to be submitted is a record of the Office to which all parties have access.\n(c) Specification and drawings. A specification or drawing of a United States patent application or patent is admissible as evidence only to prove what the specification or drawing describes. If there is data in the specification or a drawing upon which a party intends to rely to prove the truth of the data, an affidavit by an individual having first-hand knowledge of how the data was generated must be filed.","path":["Title 37—Patents, Trademarks, and Copyrights","CHAPTER I—UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE","SUBCHAPTER A—GENERAL","PART 42—TRIAL PRACTICE BEFORE THE PATENT TRIAL AND APPEAL BOARD","Subpart A—Trial Practice and Procedure"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-37.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:45Z","sha256":"a4a9c5d9301ebe4b0b582c4b3d60bf86594517acd0bc4cbadb0452c3f0057979","source_id":"us-cfr","stale":true,"prev":"us/37-cfr-42.57","next":"us/37-cfr-42.62"},"notice":"GroundRules: Original legal text. Not legal advice."}