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IPC Subgroup
B61L 1/02

Electric devices associated with track

Introduced: September 1968

Last revised: January 2006

Full Title

Devices along the route controlled by interaction with the vehicle or train > Electric devices associated with track

Classification Context

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

4 direct subcodes

Child Classifications

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  • B61L 1/04 mechanically actuated by a part of the vehicle
  • B61L 1/06 actuated by deformation of rail; actuated by vibration in rail
  • B61L 1/08 magnetically actuated; electrostatically actuated
  • B61L 1/1 actuated by electromagnetic radiation; actuated by particle radiation

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