Patents by Inventor Hilda Willis

Hilda Willis 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).

  • Apparatus for interfacing between telephone and wireless communication systems
    Patent number: 4005269
    Abstract: An apparatus for interfacing between a telephone instrument and a wireless communication system is disclosed. Subsystems of the apparatus include: telephone answering; telephone handset acoustic coupling (called "audio transducer"); transceiver acoustic coupling (called "audio mixing"), and a voice-loop circuit which isolates incoming and outgoing communication signals.Features of the invention include the use of the second (transceiver) acoustic coupling subsystem which allows, among other functions, any microphone (supplied with the transceiver) to be acoustic impedance-matched to the apparatus.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: January 25, 1977
    Assignee: Harry H. Hicks, Jr.
    Inventor: Hilda Willis