Hierarchy/Derived subclasses
| 200 / 1r | -> 6r | -> 6b | -> 6ba |
| -> 6bb |
uspto searches
Patent Apps in 200/6bGranted Patents in 200/6b
Use the links above or do an advanced search in ppubs for:
(200/6b.ccls. or 200/6ba.ccls. or 200/6bb.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.