Hierarchy/Derived subclasses
| 312 / 294 | -> 309 | -> 310 | -> 311 |
uspto searches
Patent Apps in 312/309Granted Patents in 312/309
Use the links above or do an advanced search in ppubs for:
(312/309.ccls. or 312/310.ccls. or 312/311.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.