Hierarchy/Derived subclasses
236 / 20r | -> 26r | -> 26b |
uspto searches
Patent Apps in 236/26bGranted Patents in 236/26b
Use the links above or do an advanced search in ppubs for:
(236/26b.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.