Patents by Inventor George K. Branner

George K. Branner 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).

  • Method and apparatus for detecting the presence or absence of a pen in pen recorder
    Patent number: 4843406
    Abstract: The present invention comprises an apparatus and method for sensing whether a pen is in the grasp of a pen claw of a drawing arm or a plotter or other graphics mechanism. More specifically, the present invention comprises a pen claw movable between an upward position and an downward writing position, the pen claw being connected to a detector which detects both upward and the downward movements of the pen claw. The pen is provided with an annular ring extending therefrom and the plotter mechanism has a stop provided thereon.
    Type: Grant
    Filed: December 17, 1987
    Date of Patent: June 27, 1989
    Assignee: Enter Computer, Inc.
    Inventors: Richard A. Murray, John White, George K. Branner