Patents by Inventor Andrew J. Zaderej

Andrew J. Zaderej 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).

  • In-line solid state time delay device
    Patent number: 4562366
    Abstract: A two-terminal in-line time delay device incorporating upon the initiation of in-put power into the device a pulsing component which, after a selected time delay, provides a gating pulse for a line-to-load series connected SCR. As the SCR is switched on, a connected transistor is turned on to provide a continuous gating current for the SCR which allows load-to-line current flow.
    Type: Grant
    Filed: December 31, 1981
    Date of Patent: December 31, 1985
    Inventors: Andrew Zaderej, Andrew J. Zaderej