Hierarchy/Derived subclasses
70 / 266 | -> 275 | -> 277 | -> 278.1 | -> s | -> 278.4 | -> 278.5 |
-> 278.6 |
uspto searches
Patent Apps in 70/278.4Granted Patents in 70/278.4
Use the links above or do an advanced search in ppubs for:
(70/278.4.ccls. or 70/278.5.ccls. or 70/278.6.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.