IPC Main Group
B61G 11/00 Buffers
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- RAILWAYS
- Subclass:
- COUPLINGS SPECIALLY ADAPTED FOR RAILWAY VEHICLES; DRAUGHT OR BUFFING APPLIANCES SPECIALLY ADAPTED FOR RAILWAY VEHICLES
Related Keywords
BUFFER(S) on rail vehicles
7 direct subcodes
Child Classifications
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- B61G 11/02 with metal springs
- B61G 11/08 with rubber springs
- B61G 11/1 with combined rubber and metal springs
- B61G 11/12 with fluid springs or shock-absorbers; Combinations thereof
- B61G 11/14 absorbing shocks by mechanical friction action; Combinations of mechanical shock-absorbers and springs
- B61G 11/16 absorbing shocks by permanent deformation of buffer element
- B61G 11/18 Details
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