Hierarchy/Derived subclasses
| 222 / 52 | -> 64 | -> 65 | |
| -> 66 | |||
| -> 67 | -> 68 | ||
| -> 69 |
uspto searches
Patent Apps in 222/64Granted Patents in 222/64
Use the links above or do an advanced search in ppubs for:
(222/64.ccls. or 222/65.ccls. or 222/66.ccls. or 222/67.ccls. or 222/68.ccls. or 222/69.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.