Hierarchy/Derived subclasses
| 28 / 1 | -> 16 | -> 17 | -> 18 | |
| -> 19 | ||||
| -> 20 | -> 21 | |||
| -> 22 | ||||
| -> 23 | -> 24 | |||
| -> 25 | ||||
| -> 26 | -> 27 | |||
| -> 28 |
CIPO searches
search just 28/16- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((28/16 <IN> CPC) <OR> (28/17 <IN> CPC) <OR> (28/18 <IN> CPC) <OR> (28/19 <IN> CPC) <OR> (28/20 <IN> CPC) <OR> (28/21 <IN> CPC) <OR> (28/22 <IN> CPC) <OR> (28/23 <IN> CPC) <OR> (28/24 <IN> CPC) <OR> (28/25 <IN> CPC) <OR> (28/26 <IN> CPC) <OR> (28/27 <IN> CPC) <OR> (28/28 <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.