[Code of Federal Regulations]
[Title 37, Volume 1]
[Revised as of July 1, 2008]
From the U.S. Government Printing Office via GPO Access
[CITE: 37CFR1.2]

[Page 12]
 
              TITLE 37--PATENTS, TRADEMARKS, AND COPYRIGHTS
 
  CHAPTER I--UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF 
                                COMMERCE
 
PART 1_RULES OF PRACTICE IN PATENT CASES--Table of Contents
 
                      Subpart A_General Provisions
 
Sec. 1.2  Business to be transacted in writing.

    All business with the Patent and Trademark Office should be 
transacted in writing. The personal attendance of applicants or their 
attorneys or agents at the Patent and Trademark Office is unnecessary. 
The action of the Patent and Trademark Office will be based exclusively 
on the written record in the Office. No attention will be paid to any 
alleged oral promise, stipulation, or understanding in relation to which 
there is disagreement or doubt.