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IPC Subgroup
B61L 25/02

Indicating or recording positions or identities of vehicles or trains

Introduced: September 1968

Last revised: January 2006

Full Title

Recording or indicating positions or identities of vehicles or trains or setting of track apparatus > Indicating or recording positions or identities of vehicles or trains

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
RAILWAYS
Subclass:
GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC

1 direct subcode

Child Classifications

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  • B61L 25/04 Indicating or recording train identities

Top Applicants

Top 10 applicants by patent filingsfor class B61, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SIEMENS MOBILITY DE 2,749
  2. CRRC QINGDAO SIFANG COMPANY 2,215
  3. SIEMENS DE 1,941
  4. ALSTOM TRANSPORT TECHNOLOGIES FR 1,514
  5. BYD COMPANY 1,371
  6. CRRC CHANGCHUN RAILWAY VEHICLES COMPANY 1,205
  7. CRRC ZHUZHOU LOCOMOTIVE COMPANY 1,165
  8. CRRC TANGSHAN COMPANY 1,119
  9. BOMBARDIER TRANSPORTATION DE 1,001
  10. SOUTHWEST JIAOTONG UNIVERSITY 958