Patents by Inventor Gary Eisenhauer

Gary Eisenhauer 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).

  • Single channel subscriber carrier system
    Patent number: 4653046
    Abstract: There is provided an improved subscriber carrier system which enables the transmission of both voice frequencies and carrier frequencies by a common line without the need for a battery at the subscriber carrier terminal to supply power for the subscriber carrier electronics. A high voltage power supply is utilized to supply power, both for the voice frequency terminal and the subscriber carrier terminal. Loop supervision circuitry is isolated from the power supply. Ringing signals are detected and regenerated at a frequency to pass through the isolation circuit.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: March 24, 1987
    Assignee: Brand-Rex Company
    Inventors: Gary Eisenhauer, Frank Simokat