Hierarchy/Derived subclasses
| 70 / 266 | -> 336 | -> 416 | -> 419 | -> 420 |
| -> 421 |
uspto searches
Patent Apps in 70/419Granted Patents in 70/419
Use the links above or do an advanced search in ppubs for:
(70/419.ccls. or 70/420.ccls. or 70/421.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.