Hierarchy/Derived subclasses
| 312 / 3 | -> 4 | -> 5 |
uspto searches
Patent Apps in 312/4Granted Patents in 312/4
Use the links above or do an advanced search in ppubs for:
(312/4.ccls. or 312/5.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.