Description: 122 / (36) Boilers And Water Heaters (67) Fire Tube Boilers

Hierarchy/Derived subclasses

122 / 36-> 67-> 68-> 69-> 70
   -> 71-> 72
    -> 73
   -> 74-> 75-> 76-> 77
      -> 78
  -> 79-> 80
  -> 81

CIPO searches

search just 122/67

- or -

search hierarchy!

The "search hierarchy!" link will execute this search:
((122/67 <IN> CPC) <OR> (122/68 <IN> CPC) <OR> (122/69 <IN> CPC) <OR> (122/70 <IN> CPC) <OR> (122/71 <IN> CPC) <OR> (122/72 <IN> CPC) <OR> (122/73 <IN> CPC) <OR> (122/74 <IN> CPC) <OR> (122/75 <IN> CPC) <OR> (122/76 <IN> CPC) <OR> (122/77 <IN> CPC) <OR> (122/78 <IN> CPC) <OR> (122/79 <IN> CPC) <OR> (122/80 <IN> CPC) <OR> (122/81 <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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