Hierarchy/Derived subclasses
| 29 / 91 | -> 91.1 | |
| -> 91.2 | -> 91.3 | |
| -> 91.4 | ||
| -> 91.5 | ||
| -> 91.6 | ||
| -> 91.7 | -> 91.8 |
uspto searches
Patent Apps in 29/91Granted Patents in 29/91
Use the links above or do an advanced search in ppubs for:
(29/91.ccls. or 29/91.1.ccls. or 29/91.2.ccls. or 29/91.3.ccls. or 29/91.4.ccls. or 29/91.5.ccls. or 29/91.6.ccls. or 29/91.7.ccls. or 29/91.8.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.