Hierarchy/Derived subclasses
| 253 / 1 | -> 13 | -> 17 | -> 18 | -> 19 |
| -> 20 | ||||
| -> 21 |
CIPO searches
search just 253/17- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((253/17 <IN> CPC) <OR> (253/18 <IN> CPC) <OR> (253/19 <IN> CPC) <OR> (253/20 <IN> CPC) <OR> (253/21 <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.