Hierarchy/Derived subclasses
| 28 / 29 | -> 50 | -> 55 | -> 56 |
CIPO searches
search just 28/55- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((28/55 <IN> CPC) <OR> (28/56 <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.