Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 477/53Granted Patents in 477/53
Use the links above or do an advanced search in ppubs for:
(477/53.ccls. or 477/54.ccls. or 477/55.ccls. or 477/56.ccls. or 477/57.ccls. or 477/58.ccls. or 477/59.ccls. or 477/60.ccls. or 477/61.ccls. or 477/62.ccls. or 477/63.ccls. or 477/64.ccls. or 477/65.ccls. or 477/66.ccls. or 477/67.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.