Hierarchy/Derived subclasses
438 / 142 | -> 197 | -> 199 | -> 229 | -> 230 | -> 231 |
uspto searches
Patent Apps in 438/230Granted Patents in 438/230
Use the links above or do an advanced search in ppubs for:
(438/230.ccls. or 438/231.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.