Hierarchy/Derived subclasses
| 312 / 400 | -> 401 | -> 402 | ||
| -> 403 | ||||
| -> 404 | ||||
| -> 405 | -> 405.1 | |||
| -> 406 | -> 406.1 | |||
| -> 406.2 | ||||
| -> 407 | -> 407.1 | |||
| -> 408 |
uspto searches
Patent Apps in 312/401Granted Patents in 312/401
Use the links above or do an advanced search in ppubs for:
(312/401.ccls. or 312/402.ccls. or 312/403.ccls. or 312/404.ccls. or 312/405.ccls. or 312/405.1.ccls. or 312/406.ccls. or 312/406.1.ccls. or 312/406.2.ccls. or 312/407.ccls. or 312/407.1.ccls. or 312/408.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.