Hierarchy/Derived subclasses
| 338 / 18 | -> 20 |
| -> 21 | |
| -> 22 | |
| -> 23 | |
| -> 24 |
CIPO searches
search just 338/18- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((338/18 <IN> CPC) <OR> (338/20 <IN> CPC) <OR> (338/21 <IN> CPC) <OR> (338/22 <IN> CPC) <OR> (338/23 <IN> CPC) <OR> (338/24 <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.