Canadian Subclass Details

Description: 28 / (29) Strands (Process, Product, Apparatus) (31) Working, Finishing (38) Crimping (42) Restriction or Stuffer Box (44) Feeding

Hierarchy/Derived subclasses

28 / 29

-> 31

-> 38

-> 42

-> 44

CIPO search

search just 28/44

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.