Patents by Inventor Thorntone E. Murray

Thorntone E. Murray 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).

  • Telephone line security system
    Patent number: 4965459
    Abstract: A telephone line security system which provides for telephone subscriber designation of secure digit sequences, exception digit sequences, and authorization digit sequences, wherein the user must necessarily assert a subscriber designated authorization digit sequence onto the telephone line in order to place a telephone call to a telephone number containing a secure digit sequence, unless the subscriber has designated an exception digit sequence to the secure digit sequence.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: October 23, 1990
    Inventor: Thorntone E. Murray