CPC Main Group
E01B 3/00 Transverse or longitudinal sleepers (for switches or crossings E01B7/22); Other means resting directly on the ballastway for supporting rails
6 direct subcodes
Child Classifications
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- E01B 3/02 made from wood (drying or impregnating B27K)
- E01B 3/16 made from steel
- E01B 3/28 made from concrete or from natural or artificial stone (manufacture B28)
- E01B 3/44 made from other materials only if the material is essential
- E01B 3/46 made from different materials (E01B3/26, E01B3/42 take precedence)
- E01B 3/48 Distance keepers or tie-rods for sleepers
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