Patents by Inventor Wayne Grocki

Wayne Grocki 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).

  • Anti-spot burn protection for CRT
    Patent number: 4275338
    Abstract: A video amplifier circuit for a cathode ray tube in a video display includes an anti-spot burn protection system for preventing damage to the fluorescent screen when deflection voltages are removed as in tube turn-off. A diode network in the video amplifier circuit controls the rate of voltage decay on the CRT's cathode and brightness control grid following the removal of power, maintaining a pre-determined brightness control grid-cathode voltage differential thereby precluding tube turn-on.
    Type: Grant
    Filed: September 19, 1979
    Date of Patent: June 23, 1981
    Assignee: Zenith Radio Corporation
    Inventors: Wayne Grocki, Richard J. Steinmetz