Patents by Inventor William Seth Drummond

William Seth Drummond 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).

  • Surface wave termination for saw device
    Patent number: 4096455
    Abstract: A two stage surface wave termination for a surface acoustic wave device, such as a filter or delay line. The termination includes a wafer of an acoustically lossy, relatively hard polymeric material that is bonded to the surface of the SAW device's piezoelectric substrate between an end of the substrate and an interdigitated transducer provided thereon. A band of an elastomeric material is bonded to the substrate along the edge of the wafer nearest the transducer.
    Type: Grant
    Filed: February 23, 1977
    Date of Patent: June 20, 1978
    Assignee: Tektronix, Inc.
    Inventor: William Seth Drummond