Patents by Inventor Jacques Hemery

Jacques Hemery 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).

  • Darlington amplifier with excess-current protection
    Patent number: 4374364
    Abstract: A Darlington amplifier comprising an auxiliary transistor (16) for overload protection. The base of the auxiliary transistor is connected to a tapping (17) provided on a resistor (12) included between the emitter and base of the output transistor (11) of the amplifier, which resistor assists in biassing said auxiliary transistor.
    Type: Grant
    Filed: September 29, 1980
    Date of Patent: February 15, 1983
    Assignee: U.S. Philips Corporation
    Inventors: Jacques Hemery, Bernard P. Roger