Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 127/2Granted Patents in 127/2
Use the links above or do an advanced search in ppubs for:
(127/2.ccls. or 127/3.ccls. or 127/4.ccls. or 127/5.ccls. or 127/6.ccls. or 127/7.ccls. or 127/8.ccls. or 127/9.ccls. or 127/10.ccls. or 127/11.ccls. or 127/12.ccls. or 127/13.ccls. or 127/14.ccls. or 127/15.ccls. or 127/16.ccls. or 127/17.ccls. or 127/18.ccls. or 127/19.ccls. or 127/20.ccls. or 127/21.ccls. or 127/22.ccls.)
This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find patents or patent applications in those subclasses.