Hierarchy/Derived subclasses
| 66 / 169r | -> 170 | -> 171 | -> 172r | -> 173 |
| -> 172e |
uspto searches
Patent Apps in 66/172rGranted Patents in 66/172r
Use the links above or do an advanced search in ppubs for:
(66/172r.ccls. or 66/173.ccls. or 66/172e.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.