Robert M. Fesler

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Austin, TX, US

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Patents Grantslast 30 patents

Information Patent Grant
Overhead projector with catadioptric fresnel lens
- Patent number 5,568,324
- Issue date Oct 22, 1996
- Minnesota Mining and Manufacturing Company
- John C. Nelson
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Projector with multiple lamp light source
- Patent number 5,504,544
- Issue date Apr 2, 1996
- Minnesota Mining and Manufacturing Company
- John F. Dreyer
- G02 - OPTICS
Information Patent Grant
Overhead projector with catadioptric fresnel lens
- Patent number 5,296,882
- Issue date Mar 22, 1994
- Minnesota Mining and Manufacturing Company
- John C. Nelson
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY