[Code of Federal Regulations] [Title 37, Volume 1] [Revised as of July 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 37CFR10.56] [Page 367] TITLE 37--PATENTS, TRADEMARKS, AND COPYRIGHTS CHAPTER I--UNITED STATES PATENT AND TRADEMARK OFFICE, DEPARTMENT OF COMMERCE PART 10--REPRESENTATION OF OTHERS BEFORE THE PATENT AND TRADEMARK OFFICE-- Table of Contents Sec. 10.56 Canon 4. A practitioner should preserve the confidences and secrets of a client.