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3762794
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Information
Patent Grant
3762794
References
Source
Patent Number
3,762,794
Date Filed
Not available
Date Issued
Tuesday, October 2, 1973
51 years ago
CPC
G02B17/0668 - having non-imaging properties
G02B19/0023 - at least one surface having optical power
G02B19/0033 - characterised by the use
US Classifications
359 - Optical: systems and elements
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