Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 347/20Granted Patents in 347/20
Use the links above or do an advanced search in ppubs for:
(347/20.ccls. or 347/21.ccls. or 347/22.ccls. or 347/23.ccls. or 347/24.ccls. or 347/25.ccls. or 347/26.ccls. or 347/27.ccls. or 347/28.ccls. or 347/29.ccls. or 347/30.ccls. or 347/31.ccls. or 347/32.ccls. or 347/33.ccls. or 347/34.ccls. or 347/35.ccls. or 347/36.ccls. or 347/37.ccls. or 347/38.ccls. or 347/39.ccls. or 347/40.ccls. or 347/41.ccls. or 347/42.ccls. or 347/43.ccls. or 347/44.ccls. or 347/45.ccls. or 347/46.ccls. or 347/47.ccls. or 347/48.ccls. or 347/49.ccls. or 347/50.ccls. or 347/51.ccls. or 347/52.ccls. or 347/53.ccls. or 347/54.ccls. or 347/55.ccls. or 347/56.ccls. or 347/57.ccls. or 347/58.ccls. or 347/59.ccls. or 347/60.ccls. or 347/61.ccls. or 347/62.ccls. or 347/63.ccls. or 347/64.ccls. or 347/65.ccls. or 347/66.ccls. or 347/67.ccls. or 347/68.ccls. or 347/69.ccls. or 347/70.ccls. or 347/71.ccls. or 347/72.ccls. or 347/73.ccls. or 347/74.ccls. or 347/75.ccls. or 347/76.ccls. or 347/77.ccls. or 347/78.ccls. or 347/79.ccls. or 347/80.ccls. or 347/81.ccls. or 347/82.ccls. or 347/83.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.