Patents by Inventor James R. Wojnarowski

James R. Wojnarowski 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).

  • Automatic selection of decryption key for multiple-key encryption systems
    Patent number: 4440976
    Abstract: A receiver of digitally encoded voice signals that may be encrypted according to a plurality of keep subjects a received signal to decryption according to each of the keys. Decrypted signals are tested for the presence of modulation, and the signal, if any, that is decrypted is recovered for use. If it is desired, a visual indication may tell a user which key is being used to decrypt the signal.
    Type: Grant
    Filed: June 17, 1981
    Date of Patent: April 3, 1984
    Assignee: Motorola, Inc.
    Inventors: Paul M. Bocci, Terence E. Sumner, James R. Wojnarowski