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Charles W. Harpold

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  • Grand Rapids, MI, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Method and apparatus for handling printing ink
    • Patent number 5,407,097
    • Issue date Apr 18, 1995
    • Harco Graphic Products, Inc.
    • Charles W. Harpold
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Method and apparatus for handling printing ink
    • Patent number 5,275,100
    • Issue date Jan 4, 1994
    • Harco Graphic Products, Inc.
    • Charles W. Harpold
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Method and apparatus for handling printing ink
    • Patent number 5,170,710
    • Issue date Dec 15, 1992
    • Harco Graphic Products, Inc.
    • Charles W. Harpold
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Printer
    • Patent number 5,020,430
    • Issue date Jun 4, 1991
    • Harco Graphic Products, Inc.
    • Charles W. Harpold
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Screen printer with plater sifting structure
    • Patent number 4,920,878
    • Issue date May 1, 1990
    • Harco Graphic Products Inc.
    • Charles W. Harpold
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Cleaning apparatus and method
    • Patent number 4,826,539
    • Issue date May 2, 1989
    • Harco Graphic Products, Inc.
    • Charles W. Harpold
    • B08 - CLEANING
  • Information Patent Grant

    Flat bed screen printing press
    • Patent number 4,817,523
    • Issue date Apr 4, 1989
    • Harco Graphic Products, Inc.
    • Charles W. Harpold
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Machine for screen printing numbers
    • Patent number 4,809,604
    • Issue date Mar 7, 1989
    • Harco Graphic Products, Inc.
    • Charles W. Harpold
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Belt tracking system for screen printing conveyor driers
    • Patent number 4,750,608
    • Issue date Jun 14, 1988
    • Harco Graphic Products, Inc.
    • Charles W. Harpold
    • B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
  • Information Patent Grant

    Printing screen and method
    • Patent number 4,381,706
    • Issue date May 3, 1983
    • Charles W. Harpold
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Method for screen printing
    • Patent number 4,351,238
    • Issue date Sep 28, 1982
    • Charles W. Harpold
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS