John Van der Kruik

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Walnut, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Microfiche to microfilm reformatter, microfiche copier, process of...
- Patent number 5,268,714
- Issue date Dec 7, 1993
- Robert D. Alkema
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
High-volume projector and rotary xerographic processor
- Patent number 4,912,517
- Issue date Mar 27, 1990
- Micro-50, Inc.
- Robert Alkema
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY