Skip to content
PCE
Search Classifications
Search for IPC and CPC classification codes or keywords
IPC Subgroup
E01B 9/54

Rail chairs

Introduced: September 1968

Last revised: January 2006

Full Title

Fastening rails on sleepers, or the like > Indirect fastening of rails by using tie-plates or chairs; Fastening of rails on the tie-plates or in the chairs > Rail chairs

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

1 direct subcode

Child Classifications

Navigate with arrow keys, Enter to open

  • E01B 9/56 for rails with two or more treads

Top Applicants

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

  1. CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP COMPANY 2,096
  2. CHANG AN UNIVERSITY 1,878
  3. ROAD & BRIDGE INTERNATIONAL COMPANY 1,796
  4. CREEC (CHINA RAILWAY ERYUAN ENGINEERING GROUP) 1,493
  5. CHINA RAILWAY MAJOR BRIDGE ENGINEERING GROUP COMPANY 1,327
  6. CCCC FIRST HIGHWAY ENGINEERING GROUP COMPANY 1,133
  7. CCCC SECOND HARBOUR ENGINEERING COMPANY 1,029
  8. PLASSER & THEURER EXPORT VON BAHNBAUMASCHINEN AT 935
  9. TONGJI UNIVERSITY 899
  10. CATERPILLAR PAVING PRODUCTS US 868