Hierarchy/Derived subclasses
| 253 / 1 | -> 28 | -> 33 | -> 36 | -> 38 | -> 39 |
CIPO searches
search just 253/38- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((253/38 <IN> CPC) <OR> (253/39 <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.