Patents by Inventor Robert M. Flegal

Robert M. Flegal 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).

  • Patent number: 4318096
    Abstract: A graphics input device for use with location indicating means to present graphic data upon a computer controlled visual display. The device includes a pen having a housing within which is disposed a conductive stylus shaft, one end extending beyond the housing to serve as the writing tip. A cylindrical off-axis pressure transducer encircles a portion of the stylus shaft within the housing, adjacent its writing end, for generating a variable output electrical signal proportional to the variable off-axis force applied to the stylus independently of the rotational orientation of the pen. A display processing and control system receives the variable signals and modifies a visual characteristic of the graphic data in response thereto.
    Type: Grant
    Filed: May 19, 1980
    Date of Patent: March 2, 1982
    Assignee: Xerox Corporation
    Inventors: David D. Thornburg, Robert M. Flegal, Tat C. Lam