Hierarchy/Derived subclasses
70 / 12 | -> 15 | -> 21 |
CIPO search
search just 70/21This 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.
Intellectual Property from a Historical Perspective
70 / 12 | -> 15 | -> 21 |