Patents by Inventor Heinz E. Grellmann

Heinz E. Grellmann 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).

  • Integrated pad switch
    Patent number: 4831222
    Abstract: An integrated pad switch has conductive contacts that may be embedded in a flexible substrate to form a wiper contact. The flexible substrate is backed by a foamed elastic block and mounted on a driver. The wiper contact moves across the surface of a hybrid circuit substrate having an electrical circuit to provide the desired switching function.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: May 16, 1989
    Assignee: Tektronix, Inc.
    Inventors: Heinz E. Grellmann, Leonard A. Roland
  • High frequency coaxial switch
    Patent number: 4695811
    Abstract: A high frequency coaxial switch has a coaxial connector mounted on a housing to provide electrical access to a cavity within the housing, the cavity being small to suppress moding. The coaxial connector is electrically connected to a microstrip conductor on a hybrid circuit board within the cavity, and switching is accomplished by compensated contact striplines which electrically make or break contact with the microstrip conductor.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: September 22, 1987
    Assignee: Tektronix, Inc.
    Inventors: Heinz E. Grellmann, Leonard A. Roland