Patents by Inventor Paul Greb

Paul Greb 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).

  • Device for remote control of electrical power units
    Patent number: 4024502
    Abstract: An apparatus for remotely controlling one or more power units including a transmitter which produces an optical pulse train having a frequency varied by an astable multivibrator controlled by keys which connect different resistances into the astable circuit, and one or more receivers. Each receiver receives the optical pulses, converts them to electrical pulses, divides the frequency, counts the electrical pulses, provides an analog output from the counter and compares that analog output with a saw tooth periodic waveform to control circuit elements which in turn control conduction through the power unit.
    Type: Grant
    Filed: October 23, 1975
    Date of Patent: May 17, 1977
    Assignee: Preh Elektrofeinmechanische Werke, Jakob Preh Nachf.
    Inventors: Helmut Eberwein, Alfred Vogt, Paul Greb