Description: 321 / (12) Current Conversion (E.G. Rectification, Derectification) (34) D.C. to A.C. Conversion (e.g., Derectification, Inverter) (36) Mechanical Switch Type Converter (37) Vibrating Switch Type Converter

Hierarchy/Derived subclasses

321 / 12	-> 34	-> 36	-> 37	-> 38
				-> 39

CIPO searches

search just 321/37

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search hierarchy!

The "search hierarchy!" link will execute this search:
((321/37 <IN> CPC) <OR> (321/38 <IN> CPC) <OR> (321/39 <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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