Hierarchy/Derived subclasses
141 / 18 | -> 21 | -> 25 | -> 26 |
-> 27 | |||
-> 28 |
uspto searches
Patent Apps in 141/25Granted Patents in 141/25
Use the links above or do an advanced search in ppubs for:
(141/25.ccls. or 141/26.ccls. or 141/27.ccls. or 141/28.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.