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3690547
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Information
Patent Grant
3690547
References
Source
Patent Number
3,690,547
Date Filed
Not available
Date Issued
Tuesday, September 12, 1972
52 years ago
CPC
G06G1/0042 - for optics, for photography
G01M11/00 - Testing of optical apparatus Testing structures by optical methods not otherwise provided for
US Classifications
235 - Registers
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