Description: 122 / (36) Boilers And Water Heaters (47) Water Tube Boilers (48) Steam Drum Type (55) Straight Tube (60) Spur or Return Tube

Hierarchy/Derived subclasses

122 / 36

-> 47

-> 48

-> 55

-> 60

-> 61

CIPO searches

search just 122/60

- or -

search hierarchy!

The "search hierarchy!" link will execute this search:
((122/60 <IN> CPC) <OR> (122/61 <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.

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