Hierarchy/Derived subclasses
| 312 / 31 | -> 31.01 | -> 31.02 | ||
| -> 31.03 | -> 31.04 | |||
| -> 31.05 | -> 31.06 | |||
| -> 31.1 | ||||
| -> 31.2 | -> 31.3 |
uspto searches
Patent Apps in 312/31Granted Patents in 312/31
Use the links above or do an advanced search in ppubs for:
(312/31.ccls. or 312/31.01.ccls. or 312/31.02.ccls. or 312/31.03.ccls. or 312/31.04.ccls. or 312/31.05.ccls. or 312/31.06.ccls. or 312/31.1.ccls. or 312/31.2.ccls. or 312/31.3.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.