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CPC Subgroup
E01B 3/40

Slabs; Blocks; Pot sleepers; Fastening tie-rods to them

Full Title

Transverse or longitudinal sleepers (for switches or crossings E01B7/22); Other means resting directly on the ballastway for supporting rails > made from concrete or from natural or artificial stone (manufacture B28) > Slabs; Blocks; Pot sleepers; Fastening tie-rods to them

Top Applicants

Top 10 applicants by patent filingsfor class E01, 2013–2023, worldwide · Source: EPO PATSTAT

  1. PLASSER & THEURER EXPORT VON BAHNBAUMASCHINEN AT 998
  2. CATERPILLAR PAVING PRODUCTS US 937
  3. CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP COMPANY 869
  4. WIRTGEN DE 740
  5. CHINA RAILWAY MAJOR BRIDGE ENGINEERING GROUP COMPANY 685
  6. CHANG AN UNIVERSITY 615
  7. CREEC (CHINA RAILWAY ERYUAN ENGINEERING GROUP) 613
  8. SOUTHEAST UNIVERSITY 562
  9. TONGJI UNIVERSITY 500
  10. ROAD & BRIDGE INTERNATIONAL COMPANY 491