IPC Main Group
B61L 5/00 Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
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
placing RAILWAY(S),RAILROAD(S) vehicles on tracks
7 direct subcodes
Child Classifications
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- B61L 5/02 Mechanical devices for operating points or scotch-blocks
- B61L 5/04 Fluid-pressure devices for operating points or scotch-blocks
- B61L 5/06 Electric devices for operating points or scotch-blocks
- B61L 5/08 Underground actuating arrangements, e.g. for tramways
- B61L 5/1 Locking mechanisms for points; Means for indicating the setting of points
- B61L 5/12 Visible signals
- B61L 5/2 Audible signals, e.g. detonator
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