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IPC Subgroup
E01D 15/12

Portable or sectional bridges

Introduced: September 1968

Last revised: January 2006

Full Title

Movable or portable bridges; Floating bridges > Portable or sectional bridges

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
Subclass:
BRIDGES

Filing statistics

IPC E01D 15/12 belongs to the parent subclass E01D, which recorded 128,907 patent applications worldwide between 2013 and 2023. Annual filings grew from 4,299 in 2013 to 17,552 in 2023 (+308%), peaking at 18,786 applications in 2020. The most active applicants in class E01 are CHINA RAILWAY SIYUAN SURVEY AND DESIGN GROUP COMPANY (2,096 applications), CHANG AN UNIVERSITY (1,878 applications) and ROAD & BRIDGE INTERNATIONAL COMPANY (1,796 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

PORTABLE bridges

2 direct subcodes

Child Classifications

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  • E01D 15/127 combined with ground-supported vehicles for the transport, handling or placing of such bridges or of sections thereof
  • E01D 15/133 built-up from readily separable standardised sections or elements, e.g. Bailey bridges

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