Hierarchy/Derived subclasses
| 68 / 7 | -> 8 | -> 21 | -> 22 |
CIPO searches
search just 68/21- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((68/21 <IN> CPC) <OR> (68/22 <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.