Hierarchy/Derived subclasses
| 253 / 1 | -> 13 | -> 25 | -> 26 |
| -> 27 |
CIPO searches
search just 253/25- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((253/25 <IN> CPC) <OR> (253/26 <IN> CPC) <OR> (253/27 <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.