IPC Main Group
E01B 27/00 Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- FIXED CONSTRUCTIONS
- Class:
- CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- Subclass:
- PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
Related Keywords
BALLAST ways for railwaysDISTRIBUTION of ballast for railwaysLAYING of rail trackslaying TRACK(S) for railways or tramways
4 direct subcodes
Child Classifications
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- E01B 27/02 Placing the ballast; Making the ballastway; Redistributing ballasting material; Machines or devices therefor; Levelling means
- E01B 27/04 Removing the ballast; Machines therefor, whether or not additionally adapted for taking-up ballast
- E01B 27/06 Renewing or cleaning the ballast , with or without concurrent work on the track
- E01B 27/12 Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
Top Applicants
Top 10 applicants by patent filingsfor class E01, 2013–2023, worldwide · Source: EPO PATSTAT
- CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP COMPANY 2,096
- CHANG AN UNIVERSITY 1,878
- ROAD & BRIDGE INTERNATIONAL COMPANY 1,796
- CREEC (CHINA RAILWAY ERYUAN ENGINEERING GROUP) 1,493
- CHINA RAILWAY MAJOR BRIDGE ENGINEERING GROUP COMPANY 1,327
- CCCC FIRST HIGHWAY ENGINEERING GROUP COMPANY 1,133
- CCCC SECOND HARBOUR ENGINEERING COMPANY 1,029
- PLASSER & THEURER EXPORT VON BAHNBAUMASCHINEN AT 935
- TONGJI UNIVERSITY 899
- CATERPILLAR PAVING PRODUCTS US 868