Hierarchy/Derived subclasses
| 253 / 1 | -> 28 | -> 107 | -> 117 | -> 118 |
| -> 119 | ||||
| -> 120 | ||||
| -> 121 |
CIPO searches
search just 253/117- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((253/117 <IN> CPC) <OR> (253/118 <IN> CPC) <OR> (253/119 <IN> CPC) <OR> (253/120 <IN> CPC) <OR> (253/121 <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.