Hierarchy/Derived subclasses
212 / 23 | -> 24 | -> 25 | -> 28 | -> 28.2 | -> 28.5 | -> 28.6 | -> 28.7 |
CIPO search
search just 212/28.7This 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.