Hierarchy/Derived subclasses
297 / 68 | -> 72 | -> 73 | -> 74 |
uspto searches
Patent Apps in 297/74Granted Patents in 297/74
Use the links above or do an advanced search in ppubs for:
(297/74.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.