Patents by Inventor Hugh L. Fuller

Hugh L. Fuller 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: 6345875
    Abstract: Apparatus and methods for field programmable print control of an ink jet printer allow the timing and control parameters of the ink jet printer to be altered. This allows a user to replace the printhead with a higher resolution printhead. The ink jet printer has a timer processing unit that contains the timing and control parameters needed by the ink jet control circuit to generate the printhead control signals. The timer processing unit is connected to a timer interface, which may be a programmable logic interface. The timer interface receives high level timing and control signals from a data source outside the ink jet printer controller and translates the timing and control signals into timing and control data for the timer processing unit. The data source may be a computer connected to the ink jet printer. Alternatively, the data may be stored in a memory of a replacement printhead and downloaded to the controller upon replacing a current printhead with the replacement printhead.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: February 12, 2002
    Assignee: Xerox Corporation
    Inventors: Hugh L. Fuller, Kurt L. Jacobs
  • Patent number: 5563591
    Abstract: A programmable encoder having an addressable display device to display an encoder pattern of fiducial marks. The programmable encoder can be programmed to display an encoder pattern on a liquid crystal display. A sensor senses the marks on the pattern and generates sensor signals indicative of the sensed pattern. A controller connected to the sensor receives the sensor signals and outputs control signals which control the movement of a machine, such as an ink jet printer. The programmable encoder can be programmed to display any number of patterns on the addressable display device, and consequently, is highly adaptable to any number of applications requiring position, speed, or acceleration control.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: October 8, 1996
    Assignee: Xerox Corporation
    Inventors: Kurt L. Jacobs, Hugh L. Fuller, Frederick A. Donahue