Description: 270 / (112) Pusher Type (117) Surface Contact of Sheet Material (118) Driven Roll or Combing Wheel (121) Rolls Per Se

Hierarchy/Derived subclasses

270 / 112

-> 117

-> 118

-> 121

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search just 270/121

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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