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IPC Subgroup
E02D 29/14

Covers for manholes or the like; Frames for covers

Introduced: September 1968

Last revised: January 2006

Full Title

Underground or underwater structures; Retaining walls > Manhole shafts; Other inspection or access chambers; Accessories therefor > Covers for manholes or the like; Frames for covers

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
Subclass:
FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES

Filing statistics

IPC E02D 29/14 belongs to the parent subclass E02D, which recorded 300,539 patent applications worldwide between 2013 and 2023. Annual filings grew from 11,339 in 2013 to 42,780 in 2023 (+277%). The most active applicants in class E02 are KOMATSU (3,549 applications), CATERPILLAR (2,893 applications) and HITACHI CONSTRUCTION MACHINERY COMPANY (2,390 applications).

Source: EPO PATSTAT, worldwide filings

Related Keywords

COVERS for manholes in underground conduitsMANHOLE(S) covers or MANHOLE(S) frames for underground conduits

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