Hierarchy/Derived subclasses
| 222 / 160 | -> 167 | -> 169 | -> 170 |
| -> 171 | |||
| -> 172 |
uspto searches
Patent Apps in 222/169Granted Patents in 222/169
Use the links above or do an advanced search in ppubs for:
(222/169.ccls. or 222/170.ccls. or 222/171.ccls. or 222/172.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.