Patents by Inventor William Crittenden

William Crittenden 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).

  • Rotary internal combustion engine
    Patent number: 4638776
    Abstract: A rotary internal combustion engine has adjacent circular compression and combustion rotors fixed to a shaft and each having a radial vane sliding on an inner surface of a surrounding eccentric circular chamber, and an arcuate transfer passage communicating between the chambers through an intermediate wall via slots in the rotors adjacent the vanes.
    Type: Grant
    Filed: April 1, 1985
    Date of Patent: January 27, 1987
    Assignee: Matt Biljanic
    Inventor: William Crittenden