Description: 342 / (20) With Signal Or Energy Processing (21) With Memory or Storage Means

Hierarchy/Derived subclasses

342 / 20	-> 21	-> 22
		-> 22.1	-> 22.2

CIPO searches

search just 342/21

- or -

search hierarchy!

The "search hierarchy!" link will execute this search:
((342/21 <IN> CPC) <OR> (342/22 <IN> CPC) <OR> (342/22.1 <IN> CPC) <OR> (342/22.2 <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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