David B. Blumel

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Hastings-on-Hudson, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Photographic element with diazo contrast enhancement layer and meth...
- Patent number 4,777,111
- Issue date Oct 11, 1988
- Fairmount Chemical Company, Inc.
- David B. Blumel
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Contrast enhancement layer composition with naphthoquinone diazide,...
- Patent number 4,672,021
- Issue date Jun 9, 1987
- Fairmount Chemical Company
- David B. Blumel
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY