[Code of Federal Regulations] [Title 37, Volume 1] [Revised as of July 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 37CFR2.18] [Page 267] TITLE 37--PATENTS, TRADEMARKS, AND COPYRIGHTS DEPARTMENT OF COMMERCE PART 2--RULES OF PRACTICE IN TRADEMARK CASES--Table of Contents Sec. 2.18 Correspondence, with whom held. Correspondence will be sent to the applicant or a party to a proceeding at its address unless papers are transmitted by an attorney at law, or a written power of attorney is filed, or written authorization of other person entitled to be recognized is filed, or the applicant or party designates in writing another address to which correspondence is to be sent, in which event correspondence will be sent to the attorney at law transmitting the papers, or to the attorney at law designated in the power of attorney, or to the other person designated in the written authorization, or to the address designated by the applicant or party for correspondence. Correspondence will continue to be sent to such address until the applicant or party, or the attorney at law or other authorized representative of the applicant or party, indicates in writing that correspondence is to be sent to another address. Correspondence will be sent to the domestic representative of a foreign applicant unless the application is being prosecuted by an attorney at law or other qualified person duly authorized, in which event correspondence will be sent to the attorney at law or other qualified person duly authorized. Double correspondence will not be undertaken by the Patent and Trademark Office, and if more than one attorney at law or other authorized representative appears or signs a paper, the Office reply will be sent to the address already established in the file until another correspondence address is specified by the applicant or party or by the attorney or other authorized representative of the applicant or party. [54 FR 37588, Sept. 11, 1989]