Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 49/208Granted Patents in 49/208
Use the links above or do an advanced search in ppubs for:
(49/208.ccls. or 49/209.ccls. or 49/210.ccls. or 49/211.ccls. or 49/212.ccls. or 49/213.ccls. or 49/214.ccls. or 49/215.ccls. or 49/216.ccls. or 49/217.ccls. or 49/218.ccls. or 49/219.ccls. or 49/220.ccls. or 49/221.ccls. or 49/222.ccls. or 49/223.ccls. or 49/224.ccls. or 49/225.ccls. or 49/226.ccls. or 49/227.ccls. or 49/228.ccls. or 49/229.ccls. or 49/230.ccls. or 49/231.ccls. or 49/232.ccls. or 49/233.ccls. or 49/234.ccls. or 49/235.ccls. or 49/236.ccls. or 49/237.ccls. or 49/238.ccls. or 49/239.ccls. or 49/240.ccls. or 49/241.ccls. or 49/242.ccls. or 49/243.ccls. or 49/244.ccls. or 49/245.ccls. or 49/246.ccls. or 49/247.ccls. or 49/248.ccls. or 49/249.ccls. or 49/250.ccls. or 49/251.ccls. or 49/252.ccls. or 49/253.ccls. or 49/254.ccls. or 49/255.ccls. or 49/256.ccls. or 49/257.ccls. or 49/258.ccls. or 49/259.ccls. or 49/260.ccls. or 49/261.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.