Hierarchy/Derived subclasses
| 70 / 266 | -> 286 | -> 291 | -> 294 | -> 301 | -> 302 | -> 303r | -> 303a |
uspto searches
Patent Apps in 70/302Granted Patents in 70/302
Use the links above or do an advanced search in ppubs for:
(70/302.ccls. or 70/303r.ccls. or 70/303a.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.