Patents by Inventor Wayne A. Delvin

Wayne A. Delvin 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).

  • Heated transparency with malfunction detection means
    Patent number: 4894514
    Abstract: In a system for electrically heating a transparency, a malfunction in the heating circuit is detected by a Hall effect sensor that detects current changes in a lead to the heating circuit. The sensor is not directly connected to the heating circuit and detects the entire heating current at a location close to the transparency.
    Type: Grant
    Filed: July 5, 1988
    Date of Patent: January 16, 1990
    Assignee: PPG Industries, Inc.
    Inventor: Wayne A. Delvin