Hierarchy/Derived subclasses
| D21 / 398 | -> 412 | -> 413 |
uspto searches
Patent Apps in D21/413Granted Patents in D21/413
Use the links above or do an advanced search in ppubs for:
(D21/413.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.