Patents by Inventor Mark C. Gies

Mark C. Gies 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).

  • 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
  • Patent number: D565136
    Type: Grant
    Filed: August 23, 2007
    Date of Patent: March 25, 2008
    Inventor: Mark C. Gies
  • Patent number: D573210
    Type: Grant
    Filed: January 24, 2008
    Date of Patent: July 15, 2008
    Inventor: Mark C. Gies