Patents by Inventor William Arthur George Walsh

William Arthur George Walsh 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).

  • Time division multiplex switching system
    Patent number: 3935391
    Abstract: An automatic telecommunication switching system is disclosed for switching TDM speech signals and data signals between calling and called parties. The system includes auxiliary circuits. Such circuits may include a monitor or comparator to detect the presence of a particular code. They may include a code converter for receiving a code of one variety and transmitting one of another variety or for changing the speed between reception and transmission.
    Type: Grant
    Filed: July 8, 1974
    Date of Patent: January 27, 1976
    Assignee: International Standard Electric Corporation
    Inventors: Donald Adams Weir, William Arthur George Walsh