DIFF Subgroup
E01B 3/46 made from different materials (E01B3/26, E01B3/42 take precedence)
Introduced: September 1968
Title
Titles differ between systems:
IPC: made from different materials
CPC: made from different materials (E01B3/26, E01B3/42 take precedence)
Full Title
Full titles differ between systems:
IPC:
Transverse or longitudinal sleepers; Other means resting directly on the ballastway for supporting rails > made from different materials
CPC:
Transverse or longitudinal sleepers (for switches or crossings E01B7/22); Other means resting directly on the ballastway for supporting rails > made from different materials (E01B3/26, E01B3/42 take precedence)
No child classifications to compare. This is a leaf node in both IPC and CPC.