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2544686
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Patent Grant
2544686
References
Source
Patent Number
2,544,686
Date Filed
Not available
Date Issued
Tuesday, March 13, 1951
73 years ago
CPC
G03B41/026 - combined with slit
G03B15/00 - Special procedures for taking photographs Apparatus therefor
US Classifications
396 - Photography
356 - Optics: measuring and testing
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