Hierarchy/Derived subclasses
144 / 382 | -> 420 | -> 421 | -> 422 | -> 424 |
uspto searches
Patent Apps in 144/424Granted Patents in 144/424
Use the links above or do an advanced search in ppubs for:
(144/424.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.