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Fred G. Hammersand
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East Petersburg, PA, US
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last 30 patents
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Patent Grant
Circumferentially apertured cylindrical grid for electron tube
Patent number
4,295,077
Issue date
Oct 13, 1981
RCA Corporation
Don R. Carter
H01 - BASIC ELECTRIC ELEMENTS
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Patent Grant
Magnetron filament assembly
Patent number
4,264,843
Issue date
Apr 28, 1981
RCA Corp.
Fred G. Hammersand
H01 - BASIC ELECTRIC ELEMENTS