Hierarchy/Derived subclasses
| 154 / 41 | -> 72 | -> 72.18 | -> 72.19 |
CIPO searches
search just 154/72.18- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((154/72.18 <IN> CPC) <OR> (154/72.19 <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.