Patents by Inventor Edwin Julius Braun

Edwin Julius Braun 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 switching system having automated call hold facilities
    Patent number: 4022983
    Abstract: A wired logic PBX switching system is disclosed in which a camp-on circuit is used to provide automated call hold service. A station user places an existing call on hold by flashing the station switchhook contacts and dialing a predetermined code. The dialing of the code disconnects the station from the first call and places the trunk circuit serving the first call on hold. A second call may then be placed from the station. Upon termination of the second call, the hold condition is removed from the trunk circuit and a connection is reestablished from the trunk circuit to the station.
    Type: Grant
    Filed: July 2, 1975
    Date of Patent: May 10, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Edwin Julius Braun, Michael Stephen Lane, Henry August Meise, Jr., George William Taylor