CPC Subgroup
E01B 27/12 Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
Full Title
Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers > Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
2 direct subcodes
Child Classifications
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- E01B 27/13 Packing sleepers, with or without concurrent work on the track (preforming ballast cores or seats for sleepers E01B27/02)
- E01B 27/20 Compacting the material of the track-carrying ballastway, e.g. by vibrating the track, by surface vibrators (of trackless ballastway E01B27/02; for packing sleepers E01B27/12)
Top Applicants
Top 10 applicants by patent filingsfor class E01, 2013–2023, worldwide · Source: EPO PATSTAT
- PLASSER & THEURER EXPORT VON BAHNBAUMASCHINEN AT 998
- CATERPILLAR PAVING PRODUCTS US 937
- CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP COMPANY 869
- WIRTGEN DE 740
- CHINA RAILWAY MAJOR BRIDGE ENGINEERING GROUP COMPANY 685
- CHANG AN UNIVERSITY 615
- CREEC (CHINA RAILWAY ERYUAN ENGINEERING GROUP) 613
- SOUTHEAST UNIVERSITY 562
- TONGJI UNIVERSITY 500
- ROAD & BRIDGE INTERNATIONAL COMPANY 491