TREA

Dolf Landheer

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  • Ottawa, CA
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Patents Grantslast 30 patents

  • 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
  • Information Patent Grant

    Electrostatic printing apparatus and method
    • Patent number 4,619,515
    • Issue date Oct 28, 1986
    • Delphax Systems
    • Andrzej Maczuszenko
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Toner supply control system
    • Patent number 4,595,277
    • Issue date Jun 17, 1986
    • Andrzej Maczuszenko
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Electrostatic printing apparatus and method
    • Patent number 4,516,847
    • Issue date May 14, 1985
    • Delphax Systems
    • Andrzej Maczuszenko
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Corona device
    • Patent number 4,514,781
    • Issue date Apr 30, 1985
    • Paul E. Plasschaert
    • G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
  • Information Patent Grant

    Electrostatic recording apparatus
    • Patent number 4,254,424
    • Issue date Mar 3, 1981
    • Xerox Corporation
    • Dolf Landheer
    • B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS