Hierarchy/Derived subclasses
| 213 / 75r | -> 77 | -> 100r | -> 104 | -> 109 | -> 115 | -> 131 | -> 132 | -> 133 | |
| -> 134 | |||||||||
| -> 135 | -> 136 |
uspto searches
Patent Apps in 213/132Granted Patents in 213/132
Use the links above or do an advanced search in ppubs for:
(213/132.ccls. or 213/133.ccls. or 213/134.ccls. or 213/135.ccls. or 213/136.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.