Hierarchy/Derived subclasses
254 / 18 | -> 21 | -> 25 | -> 26r | -> 26e |
uspto searches
Patent Apps in 254/26rGranted Patents in 254/26r
Use the links above or do an advanced search in ppubs for:
(254/26r.ccls. or 254/26e.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.