Hierarchy/Derived subclasses
200 / 19.01 | -> 19.2 | -> 19.21 | -> 19.22 |
-> 19.23 | |||
-> 19.24 | |||
-> 19.25 |
uspto searches
Patent Apps in 200/19.21Granted Patents in 200/19.21
Use the links above or do an advanced search in ppubs for:
(200/19.21.ccls. or 200/19.22.ccls. or 200/19.23.ccls. or 200/19.24.ccls. or 200/19.25.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.