Patents by Inventor Earl S. McKeen, Jr.

Earl S. McKeen, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Verified mail system
    Patent number: 4037956
    Abstract: Apparatus, means, and method for a verified mail system comprising copying devices for making copies of mail contents, a central depository for storage of the copied mail contents, a system for retrieval of copied mail contents and the reproduction of mail contents on an unalterable medium.
    Type: Grant
    Filed: December 19, 1975
    Date of Patent: July 26, 1977
    Inventor: Earl S. McKeen, Jr.