Patents by Inventor Joseph C. Thornwall

Joseph C. Thornwall 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).

  • Electronic device providing automatic permutations of a Vigenere Square
    Patent number: 4675477
    Abstract: This invention relates to cryptographic teletypewriter systems and more picularly to an electronic device for use in such systems which automatically provides permutations of a Vigenere Square.
    Type: Grant
    Filed: May 13, 1964
    Date of Patent: June 23, 1987
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventor: Joseph C. Thornwall