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Dolf Landheer
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Ottawa, CA
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Patents Grants
last 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