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3506350
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Information
Patent Grant
3506350
References
Source
Patent Number
3,506,350
Date Filed
Not available
Date Issued
Tuesday, April 14, 1970
54 years ago
CPC
G01J1/4209 - Photoelectric exposure meters for determining the exposure time in recording or reproducing
G01J1/4223 - specially adapted for copy - or printing apparatus
G03B27/66 - specially adapted for holding half-tone screens
G03B27/72 - Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
US Classifications
355 - Photocopying
396 - Photography
430 - Radiation imagery chemistry: process, composition, or product thereof
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