Patents by Inventor Ray Crossman

Ray Crossman 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).

  • Relief valve
    Patent number: D278551
    Type: Grant
    Filed: May 19, 1982
    Date of Patent: April 23, 1985
    Inventor: Ray Crossman
  • Relief valve
    Patent number: D296232
    Type: Grant
    Filed: July 9, 1985
    Date of Patent: June 14, 1988
    Inventor: Ray Crossman