Hierarchy/Derived subclasses
| 452 / 71 | -> 74 | -> 78 | -> 79 |
| -> 80 |
uspto searches
Patent Apps in 452/78Granted Patents in 452/78
Use the links above or do an advanced search in ppubs for:
(452/78.ccls. or 452/79.ccls. or 452/80.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.