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Steward E. Purdy
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Binghamton, NY, US
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last 30 patents
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Patent Grant
Recording medium of improved stability
Patent number
5,002,852
Issue date
Mar 26, 1991
GAF Chemicals Corporation
David F. Lewis
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Process for sensitizing polyacetylenic films
Patent number
4,970,137
Issue date
Nov 13, 1990
GAF Chemicals Corporation
David F. Lewis
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Sensitivity of processless recording media
Patent number
4,784,934
Issue date
Nov 15, 1988
GAF Corporation
David F. Lewis
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Sensitivity of processless recording media
Patent number
4,734,355
Issue date
Mar 29, 1988
GAF Corporation
David F. Lewis
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY