Hierarchy/Derived subclasses
| 70 / 431 | -> 447 | -> 448 | -> 449 |
| -> 450 | |||
| -> 451 |
uspto searches
Patent Apps in 70/448Granted Patents in 70/448
Use the links above or do an advanced search in ppubs for:
(70/448.ccls. or 70/449.ccls. or 70/450.ccls. or 70/451.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.