Hierarchy/Derived subclasses
70 / 57 | -> 237 | -> 256 | -> 257 |
uspto searches
Patent Apps in 70/257Granted Patents in 70/257
Use the links above or do an advanced search in ppubs for:
(70/257.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.