Hierarchy/Derived subclasses
| 135 / 87 | -> 91 | -> 92 | |
| -> 93 | -> 94 |
uspto searches
Patent Apps in 135/91Granted Patents in 135/91
Use the links above or do an advanced search in ppubs for:
(135/91.ccls. or 135/92.ccls. or 135/93.ccls. or 135/94.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.