Hierarchy/Derived subclasses
| 236 / 20r | -> 26r | -> 27 |
| -> 28 | ||
| -> 29 | ||
| -> 30 | ||
| -> 31 | ||
| -> 26a | ||
| -> 26b | ||
| -> 26c | ||
| -> 26d | ||
| -> 26e | ||
| -> 26f |
uspto searches
Patent Apps in 236/26rGranted Patents in 236/26r
Use the links above or do an advanced search in ppubs for:
(236/26r.ccls. or 236/27.ccls. or 236/28.ccls. or 236/29.ccls. or 236/30.ccls. or 236/31.ccls. or 236/26a.ccls. or 236/26b.ccls. or 236/26c.ccls. or 236/26d.ccls. or 236/26e.ccls. or 236/26f.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.