Hierarchy/Derived subclasses
66 / 169r | -> 170 | -> 171 | -> 177 | -> 178r | -> 180 | -> 181 |
uspto searches
Patent Apps in 66/180Granted Patents in 66/180
Use the links above or do an advanced search in ppubs for:
(66/180.ccls. or 66/181.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.