Hierarchy/Derived subclasses
| 253 / 1 | -> 28 | -> 29 | -> 30 |
| -> 31 |
CIPO searches
search just 253/29- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((253/29 <IN> CPC) <OR> (253/30 <IN> CPC) <OR> (253/31 <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.