Hierarchy/Derived subclasses
| 131 / 329 | -> 330 | -> 200 | -> 201 | -> 202 | -> 203 | -> 204 |
| -> 205 | -> 206 | |||||
| -> 207 | ||||||
| -> 209 | ||||||
| -> 210 | ||||||
| -> 211 | -> 212.1 | -> 212.2 | ||||
| -> 213 | ||||||
| -> 214 | ||||||
| -> 215.1 | -> 215.2 | |||||
| -> 215.3 |
uspto searches
Patent Apps in 131/201Granted Patents in 131/201
Use the links above or do an advanced search in ppubs for:
(131/201.ccls. or 131/202.ccls. or 131/203.ccls. or 131/204.ccls. or 131/205.ccls. or 131/206.ccls. or 131/207.ccls. or 131/209.ccls. or 131/210.ccls. or 131/211.ccls. or 131/212.1.ccls. or 131/212.2.ccls. or 131/213.ccls. or 131/214.ccls. or 131/215.1.ccls. or 131/215.2.ccls. or 131/215.3.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.