Hierarchy/Derived subclasses
427 / 457 | -> 532 | -> 541 | -> 542 |
uspto searches
Patent Apps in 427/541Granted Patents in 427/541
Use the links above or do an advanced search in ppubs for:
(427/541.ccls. or 427/542.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.