U.S. Patent Secrecy Order Statistics

According to the Federation of American Scientists Project on Government Secrecy "at the end of fiscal year 2006, there were 4942 secrecy orders in effect" for patent applications at the U.S. Patent and Trademark Office:

Other links from the FAS:

• The Invention Secrecy Act of 1951, text of 35 U.S.C. 181-188
• Patent Security Category Review List (January 1971 edition)
• The Secrecy Order Program in the U.S. Patent & Trademark Office, June 1991
• Administration of the Invention Secrecy Act in the Patent & Trademark Office, 1991
• Secrecy of Certain Inventions, implementing regulations from 37 Code of Federal Regulations part 5
• Protecting the Private Inventor Under the Peacetime Provisions of the Invention Secrecy Act by Sabing H. Lee, Berkeley Technology Law Journal, 12:2, Fall 1997.