Description: 238 / (49) Rails (51) Vignoles (Standard Rail) (52) Multiple Section
Hierarchy/Derived subclasses
CIPO searches
search just 238/52- or -
search hierarchy!
The "search hierarchy!" link will execute this search:
((238/52 <IN> CPC) <OR> (238/53 <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.