37 C.F.R. § 10.92 Contact with witnesses.
Title 37 - Patents, Trademarks, and Copyrights
(a) A practitioner shall not suppress any evidence that the practitioner or the practitioner's client has a legal obligation to reveal or produce. (b) A practitioner shall not advise or cause a person to be secreted or to leave the jurisdiction of a tribunal for the purpose of making the person unavailable as a witness therein. (c) A practitioner shall not pay, offer to pay, or acquiesce in the payment of compensation to a witness contingent upon the content of the witness' affidavit, testimony or the outcome of the case. But a practitioner may advance, guarantee, or acquiesce in the payment of: (1) Expenses reasonably incurred by a witness in attending, testifying, or making an affidavit. (2) Reasonable compensation to a witness for the witness' loss of time in attending, testifying, or making an affidavit. (3) A reasonable fee for the professional services of an expert witness.
Title 37: Patents, Trademarks, and Copyrights
PART 10—REPRESENTATION OF OTHERS BEFORE THE PATENT AND TRADEMARK OFFICE
Patent and Trademark Office Code of Professional Responsibility
§ 10.92 Contact with witnesses.
