Patents by Inventor Robert Bertold Buchner

Robert Bertold Buchner 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).

  • MFC receiver digital signal processing
    Patent number: 3976843
    Abstract: A multi-frequency code receiver which determines, by the determination of the sum signal frequencies, tone frequencies of sampled tone signal frequency combinations received in digital form by selecting nominal sum signal frequencies for the received sum signals in dependence of a criterion which determines whether or not the amplitude of the tone signal frequency of the lowest value exceeds the amplitude of the tone signal frequency of the highest value.
    Type: Grant
    Filed: December 4, 1974
    Date of Patent: August 24, 1976
    Assignee: U.S. Philips Corporation
    Inventors: Robert Bertold Buchner, Jan Philippus Maat