Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 347/171Granted Patents in 347/171
Use the links above or do an advanced search in ppubs for:
(347/171.ccls. or 347/172.ccls. or 347/173.ccls. or 347/174.ccls. or 347/175.ccls. or 347/176.ccls. or 347/177.ccls. or 347/178.ccls. or 347/179.ccls. or 347/180.ccls. or 347/181.ccls. or 347/182.ccls. or 347/183.ccls. or 347/184.ccls. or 347/185.ccls. or 347/186.ccls. or 347/187.ccls. or 347/188.ccls. or 347/189.ccls. or 347/190.ccls. or 347/191.ccls. or 347/192.ccls. or 347/193.ccls. or 347/194.ccls. or 347/195.ccls. or 347/196.ccls. or 347/197.ccls. or 347/198.ccls. or 347/199.ccls. or 347/200.ccls. or 347/201.ccls. or 347/202.ccls. or 347/203.ccls. or 347/204.ccls. or 347/205.ccls. or 347/206.ccls. or 347/207.ccls. or 347/208.ccls. or 347/209.ccls. or 347/210.ccls. or 347/211.ccls. or 347/212.ccls. or 347/213.ccls. or 347/214.ccls. or 347/215.ccls. or 347/216.ccls. or 347/217.ccls. or 347/218.ccls. or 347/219.ccls. or 347/220.ccls. or 347/221.ccls. or 347/222.ccls. or 347/223.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.