TREA

at the junction with the working face

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Industry

  • CPC
  • E21D23/0091
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Parent Industries

EFIXED CONSTRUCTIONS E21Mining E21DSHAFTS TUNNELS GALLERIES LARGE UNDERGROUND CHAMBERS E21D23/00Mine roof supports for step- by- step movement

Current Industry

E21D23/0091at the junction with the working face
Industries

Patents Grantslast 30 patents

  • Information Patent Grant

    Mining systems
    • Patent number 9,617,852
    • Issue date Apr 11, 2017
    • Seneca Industries Inc.
    • Timothy J. Myers
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining systems
    • Patent number 9,010,870
    • Issue date Apr 21, 2015
    • Seneca Industries Inc.
    • Timothy J. Myers
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining systems with guidance systems
    • Patent number 8,985,700
    • Issue date Mar 24, 2015
    • Seneca Industries Inc.
    • Timothy J. Myers
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining methods and equipment
    • Patent number 8,985,699
    • Issue date Mar 24, 2015
    • Seneca Industries Inc.
    • Timothy J. Myers
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mining methods and equipment
    • Patent number 8,770,667
    • Issue date Jul 8, 2014
    • Seneca Industries Inc.
    • Timothy J. Myers
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Self-advancing mine roof supports
    • Patent number 4,505,517
    • Issue date Mar 19, 1985
    • Dobson Park Industries PLC.
    • James Seddon
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Supporting apparatus for the protection of mine gate crossings
    • Patent number 4,416,566
    • Issue date Nov 22, 1983
    • Tatabanyai Szenbanyak
    • Ferenc Szebenyi
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Mechanized longwall system for mining
    • Patent number 4,324,509
    • Issue date Apr 13, 1982
    • Kozponti Banyaszati Fejlesztesi Intezet
    • Gyorgy Ignatko
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Walking mine support
    • Patent number 4,183,700
    • Issue date Jan 15, 1980
    • Bochumer Eisenhutte Heintzmann GmbH
    • Gerhard von Klinggraff
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Auxiliary walking mine support
    • Patent number 4,175,891
    • Issue date Nov 27, 1979
    • Bochumer Eisenhutte Heintzmann GmbH & Co
    • Gerhard von Klinggraff
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    Roof prop apparatus and method for longwall mining
    • Patent number 4,094,154
    • Issue date Jun 13, 1978
    • Bochumer Eisenhutte Heintzmann GmbH & Co.
    • Gunter Blumenthal
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3855805
    • Patent number 3,855,805
    • Issue date Dec 24, 1974
    • E21 - EARTH DRILLING MINING
  • Information Patent Grant

    3621661
    • Patent number 3,621,661
    • Issue date Nov 23, 1971
    • E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

  • Information Patent Application

    MINING SYSTEMS
    • Publication number 20170268335
    • Publication date Sep 21, 2017
    • Seneca Industries Inc.
    • Timothy J. Myers
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    MINING METHODS AND EQUIPMENT
    • Publication number 20140265524
    • Publication date Sep 18, 2014
    • Seneca Industries Inc.
    • Timothy J. Myers
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    MINING METHODS AND EQUIPMENT
    • Publication number 20140265519
    • Publication date Sep 18, 2014
    • Seneca Industries Inc.
    • Timothy J. Myers
    • E21 - EARTH DRILLING MINING
  • Information Patent Application

    MINING METHODS AND EQUIPMENT
    • Publication number 20140265522
    • Publication date Sep 18, 2014
    • Seneca Industries Inc.
    • Tim Myers
    • E21 - EARTH DRILLING MINING