Hierarchy/Derived subclasses
| 74 / 17 |
uspto searches
Patent Apps in 74/17Granted Patents in 74/17
Use the links above or do an advanced search in ppubs for:
(74/17.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.