Hierarchy/Derived subclasses
| 312 / 257.1 | -> 265.1 | -> 265.2 | -> 265.3 |
| -> 265.4 |
uspto searches
Patent Apps in 312/265.1Granted Patents in 312/265.1
Use the links above or do an advanced search in ppubs for:
(312/265.1.ccls. or 312/265.2.ccls. or 312/265.3.ccls. or 312/265.4.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.