Patents by Inventor Stephen C. Wissel

Stephen C. Wissel 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).

  • Automatically positionable chair
    Patent number: 4956592
    Abstract: A programmable automatic positioning chair for medical application. The chair has moveable support surfaces which are driven by electric motors to preprogrammed positions. Motor speed is determined by measuring the motor current, and the motor speed is integrated by a microprocessor to produce a computed value of surface position. The chair operates "open loop" without any feedback from position sensors.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: September 11, 1990
    Assignee: Midmark Corporation
    Inventors: Stephen R. Schulte, Stephen C. Wissel, John B. Wilker, Sr.