Control, warning or like safety means along the route or between vehicles or trains

Child Classifications

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• B61L 23/002 +1 CPC CPC only CPC only
• B61L 23/007 CPC only CPC only
• B61L 23/02 for indicating along the route the failure of brakes IPC+CPC Available in IPC and CPC
• B61L 23/04 for monitoring the mechanical state of the route +2 CPC IPC+CPC Available in IPC and CPC
• B61L 23/06 for warning men working on the route IPC+CPC Available in IPC and CPC
• B61L 23/08 for controlling traffic in one direction only IPC+CPC Available in IPC and CPC
• B61L 23/22 for controlling traffic in two directions over the same pair of rails IPC+CPC Available in IPC and CPC
• B61L 23/34 for indicating the distance between vehicles or trains by the transmission of signals therebetween since 1985 IPC+CPC Available in IPC and CPC