Patents by Inventor Richard J. DeHoff

Richard J. DeHoff 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: 4808979
    Abstract: The present invention constitutes a cursor image (36) for use in graphics imaging systems for providing images with three-dimensional qualities. The cursor indicates position within a three-dimensional space. The cursor comprises a reference symbol (38) located at a reference point (58) on a reference plane (60), a pointer symbol (40) located pointing to the position (42), and a tether symbol (44) connecting the reference symbol and the pointer symbol. The cursor image includes depth cue features which assist the observer in gauging the depth of the position being indicated. The cursor is preferably displayed with a stereoscopic imaging system (10) employing a liquid crystal stereo switch unit (16). In such a system the cursor image is displayed on a cathode-ray tube (12) in left and right perspective projections (46) and (48) of differing binocular disparity which are used by the observer to form a single three-dimensioinal image of the cursor.
    Type: Grant
    Filed: April 2, 1987
    Date of Patent: February 28, 1989
    Assignee: Tektronix, Inc.
    Inventors: Richard J. DeHoff, Peter W. Hildebrandt