Patents by Inventor Heinz-Peter Sprengel

Heinz-Peter Sprengel 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).

  • Electrical surface wave filter
    Patent number: 4580115
    Abstract: Electrical surface wave filter with a piezoelectric substrate support which carries on its top side an input and output transducer (14, 15), each electrically connected with a printed circuit via external input and output terminals (22, 23), and fastened by its backside on a metal support (11, 12) which comprises grounding terminals (20) integrally formed in one piece. An arrangement of symetrically disposed grounding terminals (20) eliminates the problem of electric cross-talk between the input and output terminals (22, 23).
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: April 1, 1986
    Assignee: Siemens Aktiengesellschaft
    Inventor: Heinz-Peter Sprengel