Hierarchy/Derived subclasses
| 55 / 338 | -> 338.1 | |
| -> 339 | -> 340 |
uspto searches
Patent Apps in 55/338Granted Patents in 55/338
Use the links above or do an advanced search in ppubs for:
(55/338.ccls. or 55/338.1.ccls. or 55/339.ccls. or 55/340.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.