IPC Main Group
B61K 9/00 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
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- RAILWAYS
- Subclass:
- AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
Related Keywords
rail vehicle profile GAUGE(S)rail-vehicle LOADING gaugesindicating bad RAILWAY(S),RAILROAD(S) track sectionsRAILWAY(S),RAILROAD(S) vehicles profile gauges
4 direct subcodes
Child Classifications
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- B61K 9/02 Profile gauges, e.g. loading gauges
- B61K 9/04 Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault
- B61K 9/08 Measuring installations for surveying permanent way
- B61K 9/12 Measuring or surveying wheel-rims
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