Hierarchy/Derived subclasses
| 135 / 901 |
uspto searches
Patent Apps in 135/901Granted Patents in 135/901
Use the links above or do an advanced search in ppubs for:
(135/901.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.