Patents by Inventor Francis Stanislaus Dworak

Francis Stanislaus Dworak 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).

  • Special automatic trunk testing arrangement
    Patent number: 4056698
    Abstract: An automatic trunk test arrangement is disclosed which performs transmission path monitoring on idle trunks in the normal manner and which routinely scans the supervisory states of trunks primarily for call charging purposes. When predetermined supervisory states are detected at any trunk, the routine testing of idle trunks is interrupted. The identity of the idle trunk under test is stored, and the test multiple is seized to connect the busy trunk exhibiting the predetermined supervisory states to the test multiple so that call signalling appearing on its transmission path conductors may be monitored. The connection of the transmission path monitoring apparatus is thus restricted to only those busy trunks exhibiting a predetermined supervisory state.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: November 1, 1977
    Assignee: Bell Telephone Laboratories, Incorporated
    Inventors: Francis Stanislaus Dworak, Renald Anthony Ratti