Hierarchy/Derived subclasses
215 / 200 | -> 201 | -> 217 | -> 219 | -> 220 |
uspto searches
Patent Apps in 215/219Granted Patents in 215/219
Use the links above or do an advanced search in ppubs for:
(215/219.ccls. or 215/220.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.