B61L21/00 - CPC Classification Index

ClassID:

68702 ⎘

B61L21/00 - CPC Classification

Classification description:

Station blocking between signal boxes in one yard

Sub-classes:

B61L21/02 » Mechanical locking and release of the route; Repeat locks; Coupling of semaphores 0
B61L21/04 » Electrical locking and release of the route; Electrical repeat locks 17
B61L21/06 » Vehicle-on-line indication; Monitoring locking and release of the route 7
B61L21/08 » Order transmission and reception arrangements for giving or withholding permission 2
B61L21/10 » Arrangements for trains which are closely following one another 46

Recent Application in this class:

20190308643

Railroad train with length more than platform and its marshalling system

20160200327

Railroad train with length more than platform and its marshalling system

20050107890

Method and device of generating logic control units for railroad station-based vital computer apparatuses