Patents by Inventor John H. Barker

John H. Barker 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).

  • Touch panel display
    Patent number: 5194863
    Abstract: A system which can control a plurality of opto-matrix input devices. Each opto-matrix device uses multiplexed scanning of emitter/detector pairs under control of a separate computer. The output of the opto-matrix input device is analog data which is provided to the computer for conversion to digital by the computer. The computer then determines if a stylus is located in the opto-matrix field, and if so, determines the stylus location by analysis of the received data.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: March 16, 1993
    Assignee: International Business Machines Corporation
    Inventors: John H. Barker, Ernesto LeFranc, Donald D. Williams
  • Food product manufacture
    Patent number: 5100682
    Abstract: A food product comprising a closed outer shell and a filling is made from a coextruded body. The body advances through a reciprocating cutting head 3 driven by a reciprocating shaft 10. The shaft 10 rotates to drive, through cam means, blades within the head 3.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: March 31, 1992
    Assignee: Bernard Matthews plc
    Inventors: Bernard T. Matthews, David J. Joll, David N. Wilson, John H. Barker
  • Apparatus for food product manufacture
    Patent number: 5030078
    Abstract: Apparatus for making food product comprising a closed outer shell and a filling is made from a coextruded body. The body advances through a reciprocating cutting head 3 driven by a reciprocating shaft 10. The shaft 10 rotates to drive, through cam means, blades within the head 3.
    Type: Grant
    Filed: January 26, 1990
    Date of Patent: July 9, 1991
    Assignee: Bernard Matthews plc
    Inventors: Bernard T. Matthews, David J. Joll, David N. Wilson, John H. Barker
  • Control unit for a personal computer
    Patent number: D307746
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: May 8, 1990
    Assignee: International Business Machines Corporation
    Inventors: Daniel E. Armstrong, John H. Barker, Troy A. Lee, Peter J. Mendel, Ronald A. Smith