Hierarchy/Derived subclasses
| 138 / 37 | -> 40 | -> 41 | |
| -> 42 | -> 43 | ||
| -> 44 | -> 45 | ||
| -> 46 |
uspto searches
Patent Apps in 138/40Granted Patents in 138/40
Use the links above or do an advanced search in ppubs for:
(138/40.ccls. or 138/41.ccls. or 138/42.ccls. or 138/43.ccls. or 138/44.ccls. or 138/45.ccls. or 138/46.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.