TREA

Robert S. McCallum

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  • Terra Cotta, Ontario, CA
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Patents Grantslast 30 patents

  • Information Patent Grant

    Charge transfer imaging cartridge
    • Patent number 5,030,975
    • Issue date Jul 9, 1991
    • Delphax Systems
    • Robert S. McCallum
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Charged particle printer
    • Patent number 5,006,869
    • Issue date Apr 9, 1991
    • Delphax Systems
    • W. R. Buchan
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Venetian blinding
    • Patent number 4,999,653
    • Issue date Mar 12, 1991
    • Delphax Systems
    • Robert S. McCallum
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Charge transfer imaging cartridge
    • Patent number 4,958,172
    • Issue date Sep 18, 1990
    • Delphax Systems
    • Robert S. McCallum
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Print cartridge
    • Patent number 4,890,123
    • Issue date Dec 26, 1989
    • Delphax Systems
    • Robert S. McCallum
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Ionic print cartridge and printer
    • Patent number 4,745,421
    • Issue date May 17, 1988
    • Delphax Systems
    • Robert S. McCallum
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
  • Information Patent Grant

    Ionic print cartridge and printer
    • Patent number 4,679,060
    • Issue date Jul 7, 1987
    • Robert S. McCallum
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS