Hierarchy/Derived subclasses
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uspto searches
Patent Apps in 131/280Granted Patents in 131/280
Use the links above or do an advanced search in ppubs for:
(131/280.ccls. or 131/281.ccls. or 131/282.ccls. or 131/283.ccls. or 131/284.ccls. or 131/285.ccls. or 131/286.ccls. or 131/287.ccls. or 131/288.ccls. or 131/289.ccls. or 131/27.1.ccls. or 131/28.ccls. or 131/29.ccls. or 131/30.ccls. or 131/31.ccls. or 131/32.ccls. or 131/33.ccls. or 131/34.ccls. or 131/35.ccls. or 131/36.ccls. or 131/37.ccls. or 131/38.ccls. or 131/39.ccls. or 131/40.ccls. or 131/41.ccls. or 131/42.ccls. or 131/43.ccls. or 131/44.ccls. or 131/45.ccls. or 131/46.ccls. or 131/47.ccls. or 131/48.ccls. or 131/49.ccls. or 131/50.ccls. or 131/51.ccls. or 131/52.ccls. or 131/53.ccls. or 131/54.ccls. or 131/55.ccls. or 131/56.ccls. or 131/57.ccls. or 131/57.5.ccls. or 131/58.ccls. or 131/59.ccls. or 131/60.ccls. or 131/61.1.ccls. or 131/62.ccls. or 131/63.ccls. or 131/64.1.ccls. or 131/64.2.ccls. or 131/65.ccls. or 131/66.1.ccls. or 131/66.2.ccls. or 131/67.ccls. or 131/68.ccls. or 131/69.ccls. or 131/70.ccls. or 131/71.ccls. or 131/72.ccls. or 131/73.ccls. or 131/74.ccls. or 131/75.ccls. or 131/76.ccls. or 131/77.ccls. or 131/78.ccls. or 131/79.ccls. or 131/80.ccls. or 131/81.1.ccls. or 131/82.ccls. or 131/83.1.ccls. or 131/84.1.ccls. or 131/84.2.ccls. or 131/84.3.ccls. or 131/84.4.ccls. or 131/85.ccls. or 131/86.ccls. or 131/87.ccls. or 131/88.ccls. or 131/89.ccls. or 131/90.ccls. or 131/91.ccls. or 131/92.ccls. or 131/93.ccls. or 131/94.ccls. or 131/95.ccls. or 131/96.ccls. or 131/105.ccls. or 131/106.ccls. or 131/107.ccls. or 131/108.ccls. or 131/109.1.ccls. or 131/109.2.ccls. or 131/109.3.ccls. or 131/110.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.