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IPC Subgroup
E02B 3/14

Preformed blocks; Arrangements thereof

Introduced: September 1968

Last revised: January 2006

Full Title

Engineering work in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering work in general > Structures or apparatus for, or methods of, protecting banks, coasts, or harbours > Revetment of banks, dams, watercourses, or the like > Preformed blocks; Arrangements thereof

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
Subclass:
HYDRAULIC ENGINEERING

Top Applicants

Top 10 applicants by patent filingsfor class E02, 2013–2023, worldwide · Source: EPO PATSTAT

  1. KOMATSU JP 3,549
  2. CATERPILLAR US 2,893
  3. HITACHI CONSTRUCTION MACHINERY COMPANY JP 2,390
  4. HITACHI CONSTRUCTION MACHINERY COMPANY 2,340
  5. POWERCHINA HUADONG ENGINEERING CORPORATION 2,336
  6. CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 2,174
  7. SGCC(STATE GRID CORPORATION OF CHINA) 2,119
  8. HOHAI UNIVERSITY 1,821
  9. KOMATSU 1,775
  10. POWERCHINA GUIYANG ENGINEERING CORPORATION 1,725