Dennis J. Roden

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Austin, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Reflective overhead projector with alternate light sources
- Patent number 5,135,301
- Issue date Aug 4, 1992
- Minnesota Mining and Manufacturing Company
- John F. Dreyer
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Folding arm for overhead projector
- Patent number 4,978,218
- Issue date Dec 18, 1990
- Minnesota Mining and Manufacturing Company
- Robert S. Carpenter
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY