Hierarchy/Derived subclasses
504 / 116.1 | -> 189 | -> 209 | -> 261 | -> 271 |
uspto searches
Patent Apps in 504/271Granted Patents in 504/271
Use the links above or do an advanced search in ppubs for:
(504/271.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.