Hierarchy/Derived subclasses
| 131 / 280 | -> 77 | -> 78 | -> 79 | |
| -> 80 | ||||
| -> 81.1 | ||||
| -> 82 | ||||
| -> 83.1 | ||||
| -> 84.1 | -> 84.2 | |||
| -> 84.3 | ||||
| -> 84.4 | ||||
| -> 85 | -> 86 | -> 87 |
uspto searches
Patent Apps in 131/77Granted Patents in 131/77
Use the links above or do an advanced search in ppubs for:
(131/77.ccls. or 131/78.ccls. or 131/79.ccls. or 131/80.ccls. or 131/81.1.ccls. or 131/82.ccls. or 131/83.1.ccls. or 131/84.1.ccls. or 131/84.2.ccls. or 131/84.3.ccls. or 131/84.4.ccls. or 131/85.ccls. or 131/86.ccls. or 131/87.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.