Patents by Inventor William Mark Lipscombe

William Mark Lipscombe 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).

  • Current controlled electrical circuits
    Patent number: 3983512
    Abstract: A resonant circuit is provided with a number of phase shift circuits connected in series. A control circuit is connected in series with the phase shift circuits for controlling the direct current flowing through the circuits. One of the phase shift circuits is constructed of a pair of transistors interconnected by a capacitor. The emitter resistance of the transistors is determined by the direct currents flowing therethrough from the control circuit, whereupon the frequency of oscillation or resonance of the resonant circuit is dependant upon the emitter resistance.
    Type: Grant
    Filed: August 22, 1975
    Date of Patent: September 28, 1976
    Assignee: Feedback Instruments Limited
    Inventor: William Mark Lipscombe