37 CFR 42.105 : Patents, Trademarks, And Copyrights (Section 2.11 To Chapter V) — United States Patent And Trademark Office, Department Of Commerce (Parts 1 - 199) (Section 2.11 To Parts 151-199) — Unknown Title (Parts 2 - 90) (Section 2.11 To Section 90.3) — Trial Practice Before The Patent Trial And Appeal Board (Section 42.1 To Section 42.407) — Inter Partes Review (Section 42.100 To Section 42.123) — General (Part 42) (Section 42.100 To Section 42.123) — Service of petition.

In addition to the requirements of § 42.6, the petitioner must serve the petition and exhibits relied upon in the petition as follows:

(a) The petition and supporting evidence must be served on the patent owner at the correspondence address of record for the subject patent. The petitioner may additionally serve the petition and supporting evidence on the patent owner at any other address known to the petitioner as likely to effect service.

(b) Upon agreement of the parties, service may be made electronically. Service may be by EXPRESS MAIL® or by means at least as fast and reliable as EXPRESS MAIL®. Personal service is not required.