Patents by Inventor Roger Cartret

Roger Cartret 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).

  • Voice message equipment for an automatic exchange
    Patent number: 5142527
    Abstract: The equipment includes a recorder (17) provided with at least one memory disk unit (32) for recording messages and for deferred retransmission thereof. The equipment includes circuitry (18, 22) for putting a plurality of telephone sets into communication simultaneously with a single disk controller (33) of the recorder for transmitting messages simultaneously both from the telephone sets and from the disk unit. The invention is particularly suitable for private branch exchanges.
    Type: Grant
    Filed: June 20, 1990
    Date of Patent: August 25, 1992
    Assignee: Alcatel Business Systems
    Inventors: Nathalie Barbier, Roger Cartret, Jean-Claude Hoyami, Gerald Le Cucq
  • Multi-level arbitration system for decentrally allocating resource priority among individual processing units
    Patent number: 4628447
    Abstract: A decentralized arbitrator includes an individual elementary arbitrator and a level elementary arbitrator for each arbitration unit. Determination of the priority due to one unit, when no other unit claims priority, is accelerated by directing the request states of all units on the same level and on all other levels to the input of an AND gate, the output of which is connected to the bus-utilization enablement input of the relevant unit, through an OR gate and a D flip-flop.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: December 9, 1986
    Assignee: Thomson CSF Telephone
    Inventors: Roger Cartret, Giovanni Volpe