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1033850
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Information
Patent Grant
1033850
References
Source
Patent Number
1,033,850
Date Filed
Not available
Date Issued
Tuesday, July 30, 1912
111 years ago
CPC
G02F1/1335 - Structural association of optical devices
G01C3/24 - using a parallactic triangle with fixed angles and a base of variable length in the observation station
US Classifications
356 - Optics: measuring and testing
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