Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 352/166Granted Patents in 352/166
Use the links above or do an advanced search in ppubs for:
(352/166.ccls. or 352/167.ccls. or 352/168.ccls. or 352/169.ccls. or 352/170.ccls. or 352/171.ccls. or 352/172.ccls. or 352/173.ccls. or 352/174.ccls. or 352/175.ccls. or 352/176.ccls. or 352/177.ccls. or 352/178.ccls. or 352/179.ccls. or 352/180.ccls. or 352/181.ccls. or 352/182.ccls. or 352/183.ccls. or 352/184.ccls. or 352/185.ccls. or 352/186.ccls. or 352/187.ccls. or 352/188.ccls. or 352/189.ccls. or 352/190.ccls. or 352/191.ccls. or 352/192.ccls. or 352/193.ccls. or 352/194.ccls. or 352/195.ccls. or 352/196.ccls. or 352/197.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.