Patents by Inventor Robert A. Tanner

Robert A. Tanner 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).

  • Ventilator device
    Patent number: 4715268
    Abstract: A ventilator device comprises a casing (2) having one or more openings (3) for passage of ventilation air therethrough, a shutter (7) within the casing and normally held retracted from said one or more openings, first means (15) for urging the shutter to a position to close the one or more openings, and second means (13) actuation of which releases the shutter to cause it to be moved by said first means to close said one or more openings.
    Type: Grant
    Filed: January 10, 1986
    Date of Patent: December 29, 1987
    Assignee: Dixon International Limited
    Inventor: Robert A. Tanner