Hierarchy/Derived subclasses
D21 / 398 | -> 483 | -> 513 | -> 518 |
uspto searches
Patent Apps in D21/518Granted Patents in D21/518
Use the links above or do an advanced search in ppubs for:
(D21/518.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.