Hierarchy/Derived subclasses
| 70 / 431 | -> 432 | -> 439 | -> 440 |
uspto searches
Patent Apps in 70/440Granted Patents in 70/440
Use the links above or do an advanced search in ppubs for:
(70/440.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.