Patents by Inventor Ronald George Pratt

Ronald George Pratt 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).

  • Diced substrate S.A.W. device for bulk wave attenuation
    Patent number: 4012650
    Abstract: In acoustic surface wave devices the bottom of the substrate is provided with a plurality of discrete recesses to attenuate and/or scatter bulk waves.
    Type: Grant
    Filed: August 29, 1974
    Date of Patent: March 15, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Ronald George Pratt, Richard Stevens, Alojzy Karr