Patents by Inventor Henry A. Grice

Henry A. Grice 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).

  • Apparatus and method to improve resolution of infrared touch systems
    Patent number: 6429857
    Abstract: A touch system using a plurality of infrared (“IR”) transmitters and receivers, and a method of determining with increased resolution the location of a touch between the IR transmitters and receivers using on-axis and off-axis detection are disclosed. The inventive touch system and method use, in conjunction with the on-axis and off-axis detection, a coarse and fine sweep of the transmitters and receivers to increase the resolution of identified touch location. The method of determining a touch location involves selection and activation of particular off-axis infrared transmitter and receiver pairs determined from a triangulation interdependence between the x and y coordinates. The increased resolution of the identified touch location is achievable using the inventive system and method without the need for an increased number of IR transmitters and receivers and without the need for higher speed processing capability.
    Type: Grant
    Filed: December 4, 2000
    Date of Patent: August 6, 2002
    Assignee: ELO Touchsystems, Inc.
    Inventors: Timothy E. Masters, Robert W. Knetsch, Henry A. Grice, Jr., John Deacon
  • APPARATUS AND METHOD TO IMPROVE RESOLUTION OF INFRARED TOUCH SYSTEMS
    Publication number: 20020067348
    Abstract: A touch system using a plurality of infrared (“IR”) transmitters and receivers, and a method of determining with increased resolution the location of a touch between the IR transmitters and receivers using on-axis and off-axis detection are disclosed. The inventive touch system and method use, in conjunction with the on-axis and off-axis detection, a coarse and fine sweep of the transmitters and receivers to increase the resolution of identified touch location. The method of determining a touch location involves selection and activation of particular off-axis infrared transmitter and receiver pairs determined from a triangulation interdependence between the x and y coordinates. The increased resolution of the identified touch location is achievable using the inventive system and method without the need for an increased number of IR transmitters and receivers and without the need for higher speed processing capability.
    Type: Application
    Filed: December 4, 2000
    Publication date: June 6, 2002
    Inventors: Timothy E. Masters, Robert W. Knetsch, Henry A. Grice, John Deacon
  • Aqueous dispersion of fluorocarbon polymer and halogen-containing complex phosphate of aluminum
    Patent number: 4038234
    Abstract: A coated composition is made by dispersing or dissolving in an aqueous dispersion of a fluorocarbon polymer a halogen-containing complex phosphate of aluminum.
    Type: Grant
    Filed: August 11, 1976
    Date of Patent: July 26, 1977
    Assignee: Imperial Chemical Industries Limited
    Inventors: James Derek Birchall, John Edward Cassidy, Edward Henry Grice-Hutchinson