Hierarchy/Derived subclasses
131 / 280 | -> 58 | -> 70 | -> 71 | -> 72 |
-> 73 | ||||
-> 74 | ||||
-> 75 |
uspto searches
Patent Apps in 131/70Granted Patents in 131/70
Use the links above or do an advanced search in ppubs for:
(131/70.ccls. or 131/71.ccls. or 131/72.ccls. or 131/73.ccls. or 131/74.ccls. or 131/75.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.