IPC Subgroup
E01B 7/16 Jump-over frogs
Introduced: September 1968
Last revised: January 2006
Full Title
Switches; Crossings > Frogs > Jump-over frogs
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- Subclass:
- PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS