(a) (1) The testimony of witnesses in inter partes cases may be submitted in the form of an affidavit or a declaration pursuant to § 2.20 and in conformance with the Federal Rules of Evidence, filed during the proffering party's testimony period, subject to the right of any adverse party to elect to take and bear the expense of oral cross-examination of that witness as provided under paragraph (c) of this section if such witness is within the jurisdiction of the United States, or conduct cross-examination
(a) A deposition upon written questions may be taken before any person before whom depositions may be taken as provided by Rule 28 of the Federal Rules of Civil Procedure. (b) (1) A party desiring to take a testimonial deposition upon written questions shall serve notice thereof upon each adverse party within ten days from the opening date of the testimony period of the party who serves the notice. The notice shall state the name and address of the witness. A copy of the notice, but not copies of
(a) The filing date of correspondence submitted under this section is the date of deposit with the USPS if the correspondence: (1) Is addressed as set out in § 2.190 and deposited with the USPS with sufficient postage as first-class mail; and (2) Includes a certificate of mailing for each piece of correspondence that: (i) Attests to the mailing and the address used; (ii) Includes the name of the document and the application serial number or USPTO reference number, if assigned, or registration number