Hierarchy/Derived subclasses
342 / 350 | -> 385 | -> 417 | -> 420 | -> 421 |
uspto searches
Patent Apps in 342/420Granted Patents in 342/420
Use the links above or do an advanced search in ppubs for:
(342/420.ccls. or 342/421.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.