Hierarchy/Derived subclasses
| 707 / 912 | -> 918 | -> 921 |
uspto searches
Patent Apps in 707/921Granted Patents in 707/921
Use the links above or do an advanced search in ppubs for:
(707/921.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.