Patents by Inventor Adolf Futterweit

Adolf Futterweit 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).

  • Telephone circuit monitoring system
    Patent number: 4066843
    Abstract: A telephone circuit monitoring system includes sampling means for repeatedly sampling the bistate and linear (a-c and d-c) control signals concurrently on a plurality of trunk circuits. When any of the circuits go off-hook, a central control initiates the sampling operation and repeatedly directs the sampling of the linear signals and bistate signals of each of a plurality of off-hook circuits until the monitoring purpose has been served.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: January 3, 1978
    Assignee: Applied Data Research, Inc.
    Inventors: David J. Waks, Adolf Futterweit