IPC Main Group
B61C 9/00 Locomotives or motor railcars characterised by the type of transmission system used; Transmission systems specially adapted for locomotives or motor railcars
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- RAILWAYS
- Subclass:
- LOCOMOTIVES; MOTOR RAILCARS
4 direct subcodes
Child Classifications
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- B61C 9/02 Transmission systems in or for locomotives or motor railcars with reciprocating-piston steam engines
- B61C 9/08 Transmission systems in or for locomotives or motor railcars with IC reciprocating-piston engines
- B61C 9/28 Transmission systems in or for locomotives or motor railcars with rotary prime movers, e.g. turbines
- B61C 9/38 Transmission systems in or for locomotives or motor railcars with electric motor propulsion
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