Hierarchy/Derived subclasses
| 55 / 309 | -> 309.1 | |
| -> 310 | -> 311 | |
| -> 312 | -> 313 | |
| -> 314 |
uspto searches
Patent Apps in 55/309Granted Patents in 55/309
Use the links above or do an advanced search in ppubs for:
(55/309.ccls. or 55/309.1.ccls. or 55/310.ccls. or 55/311.ccls. or 55/312.ccls. or 55/313.ccls. or 55/314.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.