Hierarchy/Derived subclasses
| 707 / 821 | -> 828 | -> 829 |
| -> 830 | ||
| -> 831 |
uspto searches
Patent Apps in 707/828Granted Patents in 707/828
Use the links above or do an advanced search in ppubs for:
(707/828.ccls. or 707/829.ccls. or 707/830.ccls. or 707/831.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.