Hierarchy/Derived subclasses
| 165 / 1 | -> 18 | -> 19 | -> 21 | -> 22 |
| -> 23 |
CIPO searches
search just 165/21- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((165/21 <IN> CPC) <OR> (165/22 <IN> CPC) <OR> (165/23 <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.