Hierarchy/Derived subclasses
| 213 / 75r | -> 188 | -> 192 | -> 200 | -> 201 | |
| -> 202 | -> 203 | ||||
| -> 204 |
uspto searches
Patent Apps in 213/200Granted Patents in 213/200
Use the links above or do an advanced search in ppubs for:
(213/200.ccls. or 213/201.ccls. or 213/202.ccls. or 213/203.ccls. or 213/204.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.