Description: 342 / (20) With Signal Or Energy Processing (23) For Motive Power (29) For Electric Drive (37) Compressor or Pump (E.g., Fan)

Hierarchy/Derived subclasses

342 / 20

-> 23

-> 29

-> 37

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search just 342/37

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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