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Statistical mapping of USPC to CPC for Class 520

Last updated 2012


USPC SubclassMost statistically relevant CPC groups
1st2nd3rd - 5th
520/1 C 08G 61/04 G 03G 5/062 B 01J 23/85 more...

Most statistically relevant CPC Subclasses
C 08G 

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Last Modified: 11/26/2012 5:18:16 PM