Hierarchy/Derived subclasses
| 70 / 12 | -> 15 | -> 19 | -> 20 |
CIPO searches
search just 70/19- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((70/19 <IN> CPC) <OR> (70/20 <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.