Patents by Inventor Andrew C. Norwine

Andrew C. Norwine 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).

  • Electrical signaling
    Patent number: 3983327
    Abstract: 1. A signal value permuting system comprising a succession of reentry circuits having successively higher reentry point values, means to send signals through a plurality of said reentry circuits in tandem, and a key for each reentry circuit, means to add key and signal values together at the input side of each reentry circuit, each key having a range of values the maximum value of which is lower than the reentry point value of the reentry circuit with which the respective key is associated.
    Type: Grant
    Filed: July 9, 1945
    Date of Patent: September 28, 1976
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Danforth K. Gannett, Andrew C. Norwine