Hierarchy/Derived subclasses
248 / 511 | -> 534 | -> 538 |
uspto searches
Patent Apps in 248/538Granted Patents in 248/538
Use the links above or do an advanced search in ppubs for:
(248/538.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.