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3711172
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Information
Patent Grant
3711172
References
Source
Patent Number
3,711,172
Date Filed
Not available
Date Issued
Tuesday, January 16, 1973
52 years ago
CPC
G03B23/06 - with rotary movement
G06K21/02 - in which coincidence of markings is sensed mechanically
US Classifications
312 - Supports: cabinet structure
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