Hierarchy/Derived subclasses
| 137 / 47 | -> 53 | -> 54 |
| -> 55 | ||
| -> 56 | ||
| -> 57 | ||
| -> 58 |
uspto searches
Patent Apps in 137/53Granted Patents in 137/53
Use the links above or do an advanced search in ppubs for:
(137/53.ccls. or 137/54.ccls. or 137/55.ccls. or 137/56.ccls. or 137/57.ccls. or 137/58.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.