Patents by Inventor Richard B. Harris

Richard B. Harris 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).

  • Electronic dimmer control for vacuum fluorescent display devices
    Patent number: 4968917
    Abstract: Apparatus and method for setting the pulse width modulation duty cycle that drives a vacuum fluorescent display device in response to changes in the setting of a dimmer control rheostat by establishing a constant window of acceptable voltage references that are changed when the setting of the dimmer control rheostat is changed, and by sequentially stepping through a set of discrete voltages whenever the setting of the dimmer control rheostat is changed until one of the discrete voltages is found to lie within the window of reference voltages. A dimmer signal is sent to a display driver circuit that corresponds to the selected discrete voltage lying within the reference window and determines the duty cycle and consequent brightness level for the display device.
    Type: Grant
    Filed: October 5, 1988
    Date of Patent: November 6, 1990
    Assignee: Ford Motor Company
    Inventor: Richard B. Harris
  • Brush with a spatula-like handle
    Patent number: D441963
    Type: Grant
    Filed: October 16, 2000
    Date of Patent: May 15, 2001
    Inventor: Richard B. Harris