Hierarchy/Derived subclasses
| 70 / 266 | -> 336 | -> 416 | -> 423 | -> 424 | |
| -> 425 | -> 426 | ||||
| -> 427 | -> 428 |
uspto searches
Patent Apps in 70/423Granted Patents in 70/423
Use the links above or do an advanced search in ppubs for:
(70/423.ccls. or 70/424.ccls. or 70/425.ccls. or 70/426.ccls. or 70/427.ccls. or 70/428.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.