Hierarchy/Derived subclasses
438 / 142 | -> 167 | -> 180 | -> 181 | -> 182 | |
-> 183 | |||||
-> 184 | -> 185 |
uspto searches
Patent Apps in 438/181Granted Patents in 438/181
Use the links above or do an advanced search in ppubs for:
(438/181.ccls. or 438/182.ccls. or 438/183.ccls. or 438/184.ccls. or 438/185.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.