Hierarchy/Derived subclasses
| 370 / 216 | -> 217 | -> 218 | -> 219 |
| -> 220 |
uspto searches
Patent Apps in 370/217Granted Patents in 370/217
Use the links above or do an advanced search in ppubs for:
(370/217.ccls. or 370/218.ccls. or 370/219.ccls. or 370/220.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.