Description: 122 / (36) Boilers And Water Heaters (47) Water Tube Boilers (48) Steam Drum Type (49) Bent Tube (50) Single Drum (53) Package Boiler
Hierarchy/Derived subclasses
CIPO search
search just 122/53This 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.