Hierarchy/Derived subclasses
| 70 / 266 | -> 267 | -> 272 | -> 273 | -> 274 |
uspto searches
Patent Apps in 70/272Granted Patents in 70/272
Use the links above or do an advanced search in ppubs for:
(70/272.ccls. or 70/273.ccls. or 70/274.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.