Patents by Inventor Keith J. Nardone

Keith J. Nardone 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).

  • Dual component flap
    Patent number: 5355910
    Abstract: A flap valve apparatus and an improved flap valve element which uses integrally bonded layers comprising a first soft flexible layer of an elastomer and a second layer of a rigid plastics material. The method of forming the flap valve element by a two component extrusion process is also disclosed.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: October 18, 1994
    Assignee: TRW Inc.
    Inventors: Mark C. Gies, Keith J. Nardone