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PCE
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CPC Subgroup
B61L 27/50

Trackside diagnosis or maintenance, e.g. software upgrades

Full Title

Central railway traffic control systems; Trackside control; Communication systems specially adapted therefor > Trackside diagnosis or maintenance, e.g. software upgrades

2 direct subcodes

Child Classifications

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  • B61L 27/53 for trackside elements or systems, e.g. trackside supervision of trackside control system conditions
  • B61L 27/57 for vehicles or trains, e.g. trackside supervision of train conditions

Top Applicants

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

  1. SIEMENS MOBILITY DE 2,967
  2. SIEMENS DE 2,133
  3. ALSTOM TRANSPORT TECHNOLOGIES FR 1,691
  4. CRRC QINGDAO SIFANG COMPANY 1,100
  5. BOMBARDIER TRANSPORTATION DE 1,085
  6. MITSUBISHI ELECTRIC CORPORATION JP 880
  7. BYD COMPANY 821
  8. KRRI KR 761
  9. HITACHI JP 752
  10. CRRC ZHUZHOU LOCOMOTIVE COMPANY 721