37 CFR § 11.51 - Depositions.
(a) Depositions for use at the hearing in lieu of the personal appearance of a witness before the hearing officer may be taken by the respondent or the OED Director by agreement; or upon a showing of good cause and with the approval of, and under such conditions as may be deemed appropriate by, the hearing officer. If a motion to take a deposition is granted, the hearing officer shall authorize a subpoena to be issued pursuant to 35 U.S.C. 24. If the deponent is a USPTO employee, the respondent shall comply with the requirements of part 104 of this chapter.
(b) A party seeking a deposition shall give reasonable notice of not less than 14 days unless a shorter period is agreed upon by the parties or authorized by the hearing officer. The notice shall state the date, time, and place of the deposition.
(c) Depositions may be taken upon oral or written questions before any officer authorized to administer an oath or affirmation in the place where the deposition is to be taken. Deposition expenses shall be borne by the party at whose instance the deposition is taken.
(d) When a deposition is taken upon written questions, copies of the written questions will be served upon the other party with the notice, and copies of any written cross-questions will be served by hand or Priority Mail Express® not less than five days before the date of the taking of the deposition unless the parties mutually agree otherwise.
(e) Testimony by deposition may be recorded by audiovisual means provided that:
(1) The notice of deposition states that the method of recording is audiovisual, and
(2) A written transcript of the deposition is prepared by a court reporter who was present at the deposition and recorded the testimony.
(f) A party on whose behalf a deposition is taken shall file with the hearing officer a copy of a transcript of the deposition signed by a court reporter and a copy of any audiovisual recording and shall serve one copy of the transcript and any audiovisual recording upon the opposing party.
(g) Depositions may not be taken to obtain discovery, except as provided for in paragraph (h) of this section.
(h) When the OED Director and the respondent agree in writing, a discovery deposition of any witness who will appear voluntarily may be taken under such terms and conditions as may be mutually agreeable to the OED Director and the respondent. The deposition shall not be filed with the hearing officer and may not be admitted into evidence before the hearing officer unless he or she orders the deposition admitted into evidence. The admissibility of the deposition shall lie within the discretion of the hearing officer, who may reject the deposition on any reasonable basis, including the fact that demeanor is involved and that the witness should have been called to appear personally before the hearing officer.