IPC Main Group
B61L 1/00 Devices along the route controlled by interaction with the vehicle or train
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- RAILWAYS
- Subclass:
- GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
Related Keywords
REGISTERING of passage of vehicles on railways
6 direct subcodes
Child Classifications
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- B61L 1/02 Electric devices associated with track
- B61L 1/12 Electric devices associated with overhead trolley wires
- B61L 1/14 Devices for indicating the passing of the end of the vehicle or train
- B61L 1/16 Devices for counting axles; Devices for counting vehicles
- B61L 1/18 Railway track circuits
- B61L 1/2 Safety arrangements for preventing or indicating malfunction of the device, e.g. by leakage current, by lightning
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