Hierarchy/Derived subclasses
| PLT / 216 | -> 221 |
uspto searches
Patent Apps in PLT/221Granted Patents in PLT/221
Use the links above or do an advanced search in ppubs for:
(PLT/221.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.