Patents by Inventor Guy G. Klinger

Guy G. Klinger 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).

  • Protective breathing apparatus and valve therefor
    Patent number: 3990439
    Abstract: A respirator or gas mask has a check valve having a seat with a raised border. A soft rubber valve is located on the seat and held thereto by a valve retainer. When the valve is not under any pressure, the valve is sealed solely by contact between the rim of the valve and the raised portion of the seat. When back-pressure is placed on the valve, it seats on the entire valve seat area.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: November 9, 1976
    Assignee: ESB Incorporated
    Inventor: Guy G. Klinger