Patents by Inventor Frederick W. Knowles

Frederick W. Knowles 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).

  • Compact high-volume gear pump
    Patent number: 5842848
    Abstract: A compact high-volume pump having a unitary body member with a plurality of cavities each containing a rotatable gear, each gear being powered by a single rotatable gear. Each of the cavities is provided with a separate inlet port and separate outlet port and may be employed to perform a plurality of separate pumping functions.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: December 1, 1998
    Inventor: Frederick W. Knowles