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IPC Subgroup
B61K 9/1

for detecting cracks in rails or welds thereof

Introduced: September 1968

Last revised: January 2006

Full Title

Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles > Measuring installations for surveying permanent way > for detecting cracks in rails or welds thereof

Classification Context

Section:
PERFORMING OPERATIONS; TRANSPORTING
Class:
RAILWAYS
Subclass:
AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR

Related Keywords

detecting cracks in RAILWAY(S),RAILROAD(S) rails or welds thereof

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