Hierarchy/Derived subclasses
| 92 / 52 | -> 56 | -> 57.4 | -> 58 |
CIPO searches
search just 92/57.4- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((92/57.4 <IN> CPC) <OR> (92/58 <IN> CPC))
This will show what classes derive from the input. Ex: entering 78/35 shows the derived classes and the search that can be used to find patents in those subclasses.