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Gregory Halpern
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Tarrytown, NY, US
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last 30 patents
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Patent Grant
RF plasma treated photosensitive lithographic printing plates
Patent number
4,777,109
Issue date
Oct 11, 1988
Robert Gumbinner
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
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Patent Grant
Lithographic printing plate
Patent number
4,596,189
Issue date
Jun 24, 1986
Surface Science Corp.
Gregory Halpern
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS