Hierarchy/Derived subclasses
| 451 / 64 | -> 162 | -> 164 | -> 165 | |
| -> 166 | ||||
| -> 167 | ||||
| -> 168 | -> 169 | |||
| -> 170 | -> 171 | |||
| -> 172 | ||||
| -> 173 | ||||
| -> 174 | -> 175 | |||
| -> 176 |
uspto searches
Patent Apps in 451/164Granted Patents in 451/164
Use the links above or do an advanced search in ppubs for:
(451/164.ccls. or 451/165.ccls. or 451/166.ccls. or 451/167.ccls. or 451/168.ccls. or 451/169.ccls. or 451/170.ccls. or 451/171.ccls. or 451/172.ccls. or 451/173.ccls. or 451/174.ccls. or 451/175.ccls. or 451/176.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.