Hierarchy/Derived subclasses
| 253 / 1 | -> 28 | -> 65 | -> 70 | -> 76 | -> 77 |
| -> 78 |
CIPO searches
search just 253/76- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((253/76 <IN> CPC) <OR> (253/77 <IN> CPC) <OR> (253/78 <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.