Description: 270 / (53) To A Stack (81) Bottom Feed
Hierarchy/Derived subclasses
CIPO searches
search just 270/81- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((270/81 <IN> CPC) <OR> (270/82 <IN> CPC) <OR> (270/83 <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.