IPC Subgroup
B61G 3/22 with coupling heads rigidly connected by locks consisting of pivoted latches
Introduced: September 1968
Last revised: January 2006
Full Title
Couplings comprising mating parts of similar shape or form which can be coupled without the use of any additional element or elements > with coupling heads rigidly connected by locks consisting of pivoted latches
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- RAILWAYS
- Subclass:
- COUPLINGS SPECIALLY ADAPTED FOR RAILWAY VEHICLES; DRAUGHT OR BUFFING APPLIANCES SPECIALLY ADAPTED FOR RAILWAY VEHICLES
2 direct subcodes
Child Classifications
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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