Hierarchy/Derived subclasses
91 / 35 | -> 36 | |
-> 37 | ||
-> 38 | ||
-> 39 | -> 40 |
uspto searches
Patent Apps in 91/35Granted Patents in 91/35
Use the links above or do an advanced search in ppubs for:
(91/35.ccls. or 91/36.ccls. or 91/37.ccls. or 91/38.ccls. or 91/39.ccls. or 91/40.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.