Hierarchy/Derived subclasses
| 401 / 132 | -> 133 | -> 134 | -> 135 |
uspto searches
Patent Apps in 401/132Granted Patents in 401/132
Use the links above or do an advanced search in ppubs for:
(401/132.ccls. or 401/133.ccls. or 401/134.ccls. or 401/135.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.