Hierarchy/Derived subclasses
| 152 / 1 | -> 17 | -> 40 | -> 41 | ||
| -> 42 | -> 43 | ||||
| -> 44 | -> 45 | -> 46 | |||
| -> 47 | -> 48 | ||||
| -> 49 | |||||
| -> 50 | -> 51 | ||||
| -> 52 |
uspto searches
Patent Apps in 152/40Granted Patents in 152/40
Use the links above or do an advanced search in ppubs for:
(152/40.ccls. or 152/41.ccls. or 152/42.ccls. or 152/43.ccls. or 152/44.ccls. or 152/45.ccls. or 152/46.ccls. or 152/47.ccls. or 152/48.ccls. or 152/49.ccls. or 152/50.ccls. or 152/51.ccls. or 152/52.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.