CPC Subgroup
E01D 15/20 collapsible, expandable, inflatable or the like (E01D15/22 takes precedence)
Full Title
Movable or portable bridges; Floating bridges > Floating bridges, e.g. pontoon bridges (landing bridges E01D15/24; floating bodies or pontoons B63B) > collapsible, expandable, inflatable or the like (E01D15/22 takes precedence)
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