Hierarchy/Derived subclasses
| 253 / 1 | -> 13 | -> 22 | -> 23 |
CIPO searches
search just 253/22- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((253/22 <IN> CPC) <OR> (253/23 <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.