Hierarchy/Derived subclasses
| 220 / 476 | -> 478 | -> 479 |
uspto searches
Patent Apps in 220/479Granted Patents in 220/479
Use the links above or do an advanced search in ppubs for:
(220/479.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.