IPC Main Group
B61L 27/00 Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor
Introduced: September 1968
Last revised: January 2022
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- RAILWAYS
- Subclass:
- GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
9 direct subcodes
Child Classifications
Navigate with arrow keys, Enter to open
- B61L 27/02 Manual systems
- B61L 27/04 Automatic systems, e.g. controlled by train; Change-over to manual control
- B61L 27/1 Operations, e.g. scheduling or time tables
- B61L 27/2 Trackside control of safe travel of vehicle or train, e.g. braking curve calculation
- B61L 27/3 Trackside multiple control systems, e.g. switch-over between different systems
- B61L 27/4 Handling position reports or trackside vehicle data
- B61L 27/5 Trackside diagnosis or maintenance, e.g. software upgrades
- B61L 27/6 Testing or simulation
- B61L 27/7 Details of trackside communication
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