Hierarchy/Derived subclasses
438 / 142 | -> 197 | -> 199 | -> 212 |
uspto searches
Patent Apps in 438/212Granted Patents in 438/212
Use the links above or do an advanced search in ppubs for:
(438/212.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.