Hierarchy/Derived subclasses
126 / 500 | -> 540 | -> 541 | -> 542 | -> 543 |
uspto searches
Patent Apps in 126/540Granted Patents in 126/540
Use the links above or do an advanced search in ppubs for:
(126/540.ccls. or 126/541.ccls. or 126/542.ccls. or 126/543.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.