IPC Subgroup
B61L 23/14 automatically operated
Introduced: September 1968
Last revised: January 2006
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
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- RAILWAYS
- Subclass:
- GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
3 direct subcodes
Child Classifications
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- B61L 23/16 Track circuits specially adapted for section blocking
- B61L 23/18 specially adapted for maintaining a safe distance between vehicles or trains depending upon speed and traffic density
- B61L 23/2 with transmission of instructions to stations along the route
Top Applicants
Top 10 applicants by patent filingsfor 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