Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 70/286Granted Patents in 70/286
Use the links above or do an advanced search in ppubs for:
(70/286.ccls. or 70/287.ccls. or 70/288.ccls. or 70/289.ccls. or 70/290.ccls. or 70/291.ccls. or 70/292.ccls. or 70/293.ccls. or 70/294.ccls. or 70/295.ccls. or 70/296.ccls. or 70/297.ccls. or 70/298.ccls. or 70/299.ccls. or 70/300.ccls. or 70/301.ccls. or 70/302.ccls. or 70/303r.ccls. or 70/303a.ccls. or 70/304.ccls. or 70/305.ccls. or 70/306.ccls. or 70/307.ccls. or 70/308.ccls. or 70/309.ccls. or 70/310.ccls. or 70/311.ccls. or 70/312.ccls. or 70/313.ccls. or 70/314.ccls. or 70/315.ccls. or 70/316.ccls. or 70/317.ccls. or 70/318.ccls. or 70/319.ccls. or 70/320.ccls. or 70/321.ccls. or 70/322.ccls. or 70/323.ccls. or 70/324.ccls. or 70/325.ccls. or 70/326.ccls. or 70/327.ccls. or 70/328.ccls. or 70/329.ccls. or 70/330.ccls. or 70/331.ccls. or 70/332.ccls. or 70/333r.ccls. or 70/334.ccls. or 70/333a.ccls.)
At about 35 search terms the uspto will give you this error "Too many search terms" The 35th term is bold.
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.