Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 215/273Granted Patents in 215/273
Use the links above or do an advanced search in ppubs for:
(215/273.ccls. or 215/274.ccls. or 215/275.ccls. or 215/276.ccls. or 215/277.ccls. or 215/278.ccls. or 215/279.ccls. or 215/280.ccls. or 215/281.ccls. or 215/282.ccls. or 215/283.ccls. or 215/284.ccls. or 215/285.ccls. or 215/286.ccls. or 215/287.ccls. or 215/288.ccls. or 215/289.ccls. or 215/290.ccls. or 215/291.ccls. or 215/292.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.