Patents by Inventor Wilson Franklin Jones

Wilson Franklin Jones 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).

  • Patent number: 3965308
    Abstract: An improved line card circuit usable with key telephone systems is adapted to permit a message to be automatically transmitted from a subscriber key telephone station when operated to place a telephone line in a hold condition. A coupling circuit interfacing the message source and the telephone line during the hold condition of the line provides a high degree of cross-talk isolation. The coupling circuit also has the feature of automatically limiting to a predetermined level the power of the output signal supplied to the telephone line. A strappable option is provided by the coupling circuit to permit its operation with a standard eight ohm high fidelity amplifier source as well as with a 70 volt intercom systems. The line card circuit, besides these features, includes circuitry to allow full supervisory control of a telephone line to be exercised by a user of the subscriber key telephone when such unit is not in the hold condition.
    Type: Grant
    Filed: November 11, 1974
    Date of Patent: June 22, 1976
    Assignee: San/Bar Corporation
    Inventors: Wilson Franklin Jones, Arthur Gene Watkins