Hierarchy/Derived subclasses
| 119 / 302 | -> 304 | -> 305 | -> 306 |
| -> 307 |
uspto searches
Patent Apps in 119/304Granted Patents in 119/304
Use the links above or do an advanced search in ppubs for:
(119/304.ccls. or 119/305.ccls. or 119/306.ccls. or 119/307.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.