Hierarchy/Derived subclasses
| 277 / 322 | -> 336 | -> 337 | -> 338 | -> 339 | |
| -> 340 | -> 341 | ||||
| -> 342 |
uspto searches
Patent Apps in 277/337Granted Patents in 277/337
Use the links above or do an advanced search in ppubs for:
(277/337.ccls. or 277/338.ccls. or 277/339.ccls. or 277/340.ccls. or 277/341.ccls. or 277/342.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.