CPC Main Group
B61L 21/00 Station blocking between signal boxes in one yard
5 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- B61L 21/02 Mechanical locking and release of the route; Repeat locks; Coupling of semaphores
- B61L 21/04 Electrical locking and release of the route; Electrical repeat locks
- B61L 21/06 Vehicle-on-line indication; Monitoring locking and release of the route
- B61L 21/08 Order transmission and reception arrangements for giving or withholding permission
- B61L 21/10 Arrangements for trains which are closely following one another
Top Applicants
Top 10 applicants by patent filingsfor class B61, 2013–2023, worldwide · Source: EPO PATSTAT
- SIEMENS MOBILITY DE 2,967
- SIEMENS DE 2,133
- ALSTOM TRANSPORT TECHNOLOGIES FR 1,691
- CRRC QINGDAO SIFANG COMPANY 1,100
- BOMBARDIER TRANSPORTATION DE 1,085
- MITSUBISHI ELECTRIC CORPORATION JP 880
- BYD COMPANY 821
- KRRI KR 761
- HITACHI JP 752
- CRRC ZHUZHOU LOCOMOTIVE COMPANY 721