Patents by Inventor Vladimir Spiro

Vladimir Spiro 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).

  • Private branch exchange having transmission channels commonly available to all stations
    Patent number: 4545049
    Abstract: A private branch exchange circuit in which information is transmitted between a plurality of subscriber stations in time division multiplex sequence over a plurality of data lines and control lines, one group of lines being for the transmission direction and a corresponding group for the reception direction, and all lines being commonly available to all stations. Pairs of oppositely directed lines are connected to complete a loop which includes a central control circuit which allocates the lines and time division time slots therein among all stations, and in the event of failure of any line re-allocates the stations to other lines.
    Type: Grant
    Filed: November 17, 1983
    Date of Patent: October 1, 1985
    Assignee: U.S. Philips Corporation
    Inventors: Walter Kammerer, Vladimir Spiro