Patents by Inventor Bernard J. Hargreaves

Bernard J. Hargreaves 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).

  • Reed valves for internal combustion engines
    Patent number: 4643139
    Abstract: A reed valve for an internal combustion engine comprises an aperture closable by a resilient valve member composed of an epoxide resin laminate. The laminate preferably includes cotton.
    Type: Grant
    Filed: July 20, 1984
    Date of Patent: February 17, 1987
    Inventor: Bernard J. Hargreaves