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IPC Subgroup
E04G 21/08

Internal vibrators

Introduced: September 1968

Last revised: January 2006

Full Title

Preparing, conveying, or working-up building materials or building elements; Other devices or measures for constructional work > Conveying or working-up concrete or similar masses able to be heaped or cast > Compacting concrete, e.g. by application of vacuum before hardening > Internal vibrators

Classification Context

Section:
FIXED CONSTRUCTIONS
Class:
BUILDING
Subclass:
SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS

Related Keywords

COMPACTING concrete in situ by internal vibratorsvibrators for compacting CONCRETE in situusing VIBRATIONS for working-up building materials in situ

Top Applicants

Top 10 applicants by patent filingsfor class E04, 2013–2023, worldwide · Source: EPO PATSTAT

  1. CHINA CONSTRUCTION EIGHTH ENGINEERING DIVISION 6,575
  2. ZHEJIANG YASHA DECORATION COMPANY 4,488
  3. SGCC(STATE GRID CORPORATION OF CHINA) 4,427
  4. CHINA CONSTRUCTION SECOND ENGINEERING BUREAU 4,352
  5. CHINA MCC17 GROUP COMPANY 3,122
  6. GOLD MANTIS FINE DECORATION TECHNOLOGY (SUZHOU) COMPANY 2,605
  7. SHENYANG JIANZHU UNIVERSITY 2,420
  8. CHINA CONSTRUCTION SEVENTH ENGINEERING DIVISION COMPANY 2,284
  9. CHINA CONSTRUCTION FIFTH ENGINEERING DIVISION CORPORATION 2,008
  10. CHINA CONSTRUCTION FIRST BUILDING (GROUP) CORPORATION 1,967