Patents by Inventor Stevens David R.

Stevens David R. 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: 4983786
    Abstract: A XY control system for controlling vector movement in two mutually perpendicular directions (for example for computer cursor control, i.e. emulating a conventional computer mouse) uses a XY pressure sensitive digital pad or more preferably a XYZ pressure sensitive digital pad generating different signals based on the selected location at which pressure is applied to the pad. These signals are divided into X or Y and a directional signal and then converted into a velocity signal for controlling the vector motion in the required direction dependent on the selected location for application of pressure to the pad and at a velocity the magnitude of which is proportional to the displacement of the selected location from a datum area on the pad, or in the case of a XYZ pad dependent on both displacement and the amount of pressure applied at the selected location.
    Type: Grant
    Filed: January 17, 1990
    Date of Patent: January 8, 1991
    Assignee: The University of British Columbia
    Inventors: Stevens David R., Andrea Marziali