Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 104/288Granted Patents in 104/288
Use the links above or do an advanced search in ppubs for:
(104/288.ccls. or 104/289.ccls. or 104/290.ccls. or 104/291.ccls. or 104/292.ccls. or 104/293.ccls. or 104/294.ccls. or 104/295.ccls. or 104/296.ccls. or 104/297.ccls. or 104/298.ccls. or 104/299.ccls. or 104/300.ccls. or 104/301.ccls. or 104/302.ccls. or 104/303.ccls. or 104/304.ccls. or 104/305.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.