TREA

Temporary supports for use during building Accessories

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Industry

  • CPC
  • E21D11/12
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D11/00Lining tunnels, galleries or other underground cavities

Current Industry

E21D11/12Temporary supports for use during building Accessories
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Composite support structure, construction system, and method
    • Patent number 11,739,639
    • Issue date Aug 29, 2023
    • SHANDONG JIANZHU UNIVERSITY
    • Jun Wang
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Tunnel construction method using pre-support and post-support and a...
    • Patent number 10,358,920
    • Issue date Jul 23, 2019
    • Dong-hyun Seo
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Anti-spalling blocking bar for large cross-section coal gallery exc...
    • Patent number 10,247,001
    • Issue date Apr 2, 2019
    • China University of Mining and Technology
    • Shengqi Yang
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Continuous roof support system for tunnel boring
    • Patent number 3,989,302
    • Issue date Nov 2, 1976
    • Dresser Industries, Inc.
    • Thomas Lonnie Arrington
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3851481
    • Patent number 3,851,481
    • Issue date Dec 3, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3812680
    • Patent number 3,812,680
    • Issue date May 28, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3547493
    • Patent number 3,547,493
    • Issue date Dec 15, 1970
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3295330
    • Patent number 3,295,330
    • Issue date Jan 3, 1967
    • E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
  • Information Patent Grant

    1800819
    • Patent number 1,800,819
    • Issue date Apr 14, 1931
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1702646
    • Patent number 1,702,646
    • Issue date Feb 19, 1929
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1644476
    • Patent number 1,644,476
    • Issue date Oct 4, 1927
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1583075
    • Patent number 1,583,075
    • Issue date May 4, 1926
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1388698
    • Patent number 1,388,698
    • Issue date Aug 23, 1921
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    1382668
    • Patent number 1,382,668
    • Issue date Jun 28, 1921
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents