Patents by Inventor Marcus B. Leonard

Marcus B. Leonard 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 servo valve
    Patent number: 5954093
    Abstract: A rotary servo valve employs a double-edged blade-like valve gate mounted inside a sleeve having a plurality of valve ports circumferentially distributed around the sleeve at predetermined angular positions. The valve gate is reciprocable from a first to a second position to provide four-way fluid flow patterns to a fluidic actuating device.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: September 21, 1999
    Inventor: Marcus B. Leonard