Patents by Inventor Herbert H. Borchers

Herbert H. Borchers 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).

  • System for multiplexing information channels adjacent to a video spectrum
    Patent number: 4078245
    Abstract: A system for multiplexing either a single or multiple information channels adjacent to the video spectrum on a TV microwave or cable by frequency modulating a high frequency subcarrier at wide deviation with one or composite information signals, translating the modulated subcarrier to a frequency adjacent to and above the video spectrum, and then bridging it into the video circuit at a level 20 dB or more below the peak video signal of the video spectrum. The system recovers the transmitted subcarrier from the video spectrum, synthesizes the subcarrier frequencies exclusive of most of the video interference in a limited bandwidth, and then detects the modulation of the synthesized subcarrier frequency.
    Type: Grant
    Filed: November 3, 1975
    Date of Patent: March 7, 1978
    Assignee: Coastcom, Inc.
    Inventors: J. Walter Johnson, Herbert H. Borchers