Hierarchy/Derived subclasses
| 70 / 57 | -> 174 | -> 207 | -> 209 | -> 210 | -> 211 | -> 212 | |
| -> 213 | -> 214 | ||||||
| -> 215 | -> 216 | -> 217 | |||||
| -> 218 | -> 219 | -> 220 | |||||
| -> 221 | -> 222 | -> 223 |
uspto searches
Patent Apps in 70/209Granted Patents in 70/209
Use the links above or do an advanced search in ppubs for:
(70/209.ccls. or 70/210.ccls. or 70/211.ccls. or 70/212.ccls. or 70/213.ccls. or 70/214.ccls. or 70/215.ccls. or 70/216.ccls. or 70/217.ccls. or 70/218.ccls. or 70/219.ccls. or 70/220.ccls. or 70/221.ccls. or 70/222.ccls. or 70/223.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.