Shaft covers

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E21F1/16

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EFIXED CONSTRUCTIONS E21Mining E21FSAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS E21F1/00Ventilation of mines or tunnels Distribution of ventilating currents

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E21F1/16Shaft covers

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Patents Grantslast 30 patents

Information Patent Grant
Ventilation system
- Patent number 11,933,177
- Issue date Mar 19, 2024
- Toyota Jidosha Kabushiki Kaisha
- Masayuki Ito
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Mine ventilation structure and a deck panel for such a structure
- Patent number 9,447,685
- Issue date Sep 20, 2016
- Jack Kennedy Metal Products and Buildings, Inc.
- William R. Kennedy
- E21 - EARTH DRILLING MINING
Information Patent Grant
Mine ventilation structure and a deck panel for such a structure
- Patent number 9,394,788
- Issue date Jul 19, 2016
- Jack Kennedy Metal Products and Buildings, Inc.
- William R. Kennedy
- E21 - EARTH DRILLING MINING
Information Patent Grant
Borehole ventilation sealcover
- Patent number 5,509,477
- Issue date Apr 23, 1996
- Marcinkowski; Victor
- Dino Ryan
- E21 - EARTH DRILLING MINING

Patents Applicationslast 30 patents

Information Patent Application
VENTILATION SYSTEM
- Publication number 20220034225
- Publication date Feb 3, 2022
- Toyota Jidosha Kabushiki Kaisha
- Masayuki ITO
- E21 - EARTH DRILLING MINING
Information Patent Application
MINE VENTILATION SYSTEM AND METHOD
- Publication number 20150322787
- Publication date Nov 12, 2015
- Courtland Joshua Helbig
- E21 - EARTH DRILLING MINING
Information Patent Application
MINE VENTILATION STRUCTURE AND A DECK PANEL FOR SUCH A STRUCTURE
- Publication number 20150315911
- Publication date Nov 5, 2015
- Jack Kennedy Metal Products & Buildings, Inc.
- William R. Kennedy
- E21 - EARTH DRILLING MINING