Hierarchy/Derived subclasses
| 91 / 152 | -> 153 | -> 154 | |
| -> 155 | |||
| -> 156 | |||
| -> 157 | -> 158 | ||
| -> 159 | -> 160 | ||
| -> 161 | -> 162 | ||
| -> 163 | |||
| -> 164 |
uspto searches
Patent Apps in 91/152Granted Patents in 91/152
Use the links above or do an advanced search in ppubs for:
(91/152.ccls. or 91/153.ccls. or 91/154.ccls. or 91/155.ccls. or 91/156.ccls. or 91/157.ccls. or 91/158.ccls. or 91/159.ccls. or 91/160.ccls. or 91/161.ccls. or 91/162.ccls. or 91/163.ccls. or 91/164.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.