Description: 122 / (36) Boilers And Water Heaters (101) Water Cooled Furnace (103) Tubular Walls (105) Wall Supports (106) With Expansion Provision
Hierarchy/Derived subclasses
CIPO search
search just 122/106This 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.