Hierarchy/Derived subclasses
81 / 300 | -> s | -> 385 | -> 395 | -> 402 | -> 404 |
uspto searches
Patent Apps in 81/404Granted Patents in 81/404
Use the links above or do an advanced search in ppubs for:
(81/404.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.