What is the Index to the U.S. Patent Classification System?
The Index to the U.S. Patent Classification System (USPC) is an alphabetic listing of technical and common terms that refer to specific classes and subclasses within the USPC. As stated in MPEP 902.01(a): “The Index to the U.S. Patent Classification System (USPC) is an alphabetic listing of technical and common terms referring to specific classes…
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