Hierarchy/Derived subclasses
131 / 280 | -> 27.1 | -> 47 | -> 48 | -> 49 | ||
-> 50 | -> 51 | -> 52 | -> 53 | |||
-> 54 |
uspto searches
Patent Apps in 131/47Granted Patents in 131/47
Use the links above or do an advanced search in ppubs for:
(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.)
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.