Patents by Inventor Guy Oeillet

Guy Oeillet 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).

  • Subscriber's electronic line equipment comprising a two-wire-four-wire conversion circuit for a telephone exchange
    Patent number: 4302636
    Abstract: Equipment without telephone transformer or amplifier.It is connected to the subscriber by terminals (1, 2) and to the telephone exchange by terminals (3, 4, 5, 6). It comprises a d.c. voltage source (8), four transistors (10, 12, 14, 16) and three pairs of equal resistors (9-11, 13-15 and 17-18). Sidetone is eliminated by the circuit (18-16-17).Of use in telephone exchanges of all kinds.
    Type: Grant
    Filed: May 24, 1979
    Date of Patent: November 24, 1981
    Assignee: Jeumont-Schneider
    Inventors: Alian Dumont, Christian Piolat, Guy Oeillet