Description: 122 / (109) Fluid Treatment And Handling (127) External Boiler Circuit (134) Condensers (136) Surface Type (137) Air Cooled

Hierarchy/Derived subclasses

122 / 109

-> 127

-> 134

-> 136

-> 137

-> 138

CIPO searches

search just 122/137

- or -

search hierarchy!

The "search hierarchy!" link will execute this search:
((122/137 <IN> CPC) <OR> (122/138 <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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