Patents by Inventor Lawrence J. Kusan

Lawrence J. Kusan 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).

  • Arrangement and method of achieving a dial pulse muting function in a register sender PABX system
    Patent number: 4007337
    Abstract: An arrangement and method for providing a dial pulse muting function to prevent the sender outpulsing from being heard is to disable the sampling of the transmit to the network side of the trunk circuit which is connected through the time switch and to the receiver from the network side of the line circuit. This function takes place in the trunk circuit, rather than the line circuit, so that less equipment is required. The function, furthermore, is provided through the use of integrated circuit chips as opposed to relays so that less space is required and the arrangement is far more reliable.
    Type: Grant
    Filed: December 22, 1975
    Date of Patent: February 8, 1977
    Assignee: GTE Automatic Electric Laboratories Incorporated
    Inventors: Lloyd L. Langsdorf, Lawrence J. Kusan, Dinesh K. Srivastava