DIFF Subgroup
B61L 23/14 automatically operated
Introduced: September 1968
Full Title
Control, warning or like safety means along the route or between vehicles or trains > for controlling traffic in one direction only > automatically operated
IPC and CPC are identically structured here. All 3 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- B61L 23/16 Track circuits specially adapted for section blocking +5 CPC IPC+CPC Available in IPC and CPC
- B61L 23/18 specially adapted for changing lengths of track sections in dependence upon speed and traffic density IPC+CPC Available in IPC and CPC
- B61L 23/20 with transmission of instructions to stations along the route IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class B61,2013–2023, worldwide · Source: EPO PATSTAT
- SIEMENS MOBILITY DE 2,749
- CRRC QINGDAO SIFANG COMPANY 2,215
- SIEMENS DE 1,941
- ALSTOM TRANSPORT TECHNOLOGIES FR 1,514
- BYD COMPANY 1,371
- CRRC CHANGCHUN RAILWAY VEHICLES COMPANY 1,205
- CRRC ZHUZHOU LOCOMOTIVE COMPANY 1,165
- CRRC TANGSHAN COMPANY 1,119
- BOMBARDIER TRANSPORTATION DE 1,001
- SOUTHWEST JIAOTONG UNIVERSITY 958
Top Applicants (CPC)
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