Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 70/144Granted Patents in 70/144
Use the links above or do an advanced search in ppubs for:
(70/144.ccls. or 70/145.ccls. or 70/467.ccls. or 70/468.ccls. or 70/469.ccls. or 70/470.ccls. or 70/471.ccls. or 70/472.ccls. or 70/473.ccls. or 70/474.ccls. or 70/475.ccls. or 70/476.ccls. or 70/477.ccls. or 70/478.ccls. or 70/479.ccls. or 70/480.ccls. or 70/481.ccls. or 70/482.ccls. or 70/483.ccls. or 70/484.ccls. or 70/485.ccls. or 70/486.ccls. or 70/487.ccls. or 70/488.ccls. or 70/489.ccls. or 70/149.ccls. or 70/150.ccls. or 70/151r.ccls. or 70/151a.ccls. or 70/152.ccls. or 70/153.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.