Patents by Inventor Joseph F. Simanis

Joseph F. Simanis 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).

  • Wireless telephone with frequency inversion scrambling
    Patent number: 5168522
    Abstract: The wireless telephone of the present invention is comprised of a base unit, coupled to a land-line telephone system, and a remote unit that communicates with the base unit over radio frequencies. The remote unit has scrambling circuits (207 and 216) for encrypting voice signals transmitted to the base unit and decrypting voice signals received from the base unit. The base unit also has scrambling circuits (107 and 116) for encrypting voice signals transmitted to the remote unit and decrypting voice signals received from the remote unit. The wireless telephone uses a keypad (222) for initiating a demonstration mode that allows both parties to the conversation to hear the scrambled voice signal.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: December 1, 1992
    Assignee: Motorola, Inc.
    Inventors: Joseph F. Simanis, Robert N. Weisshappel