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Sealing system
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Patent number 11,293,285
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Issue date Apr 5, 2022
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The Secretary of State for Defence
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Duncan Godfrey Mervyn Thompson
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E21 - EARTH DRILLING MINING
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Mine door
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Patent number 10,316,663
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Issue date Jun 11, 2019
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Jack Kennedy Metal Products and Buildings, Inc.
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William R. Kennedy
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Articulated mine door opening mechanism
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Patent number 10,184,286
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Issue date Jan 22, 2019
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Jack Kennedy Metal Products and Buildings, Inc.
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William R. Kennedy
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Ventilated mine roof support
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Patent number 9,611,738
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Issue date Apr 4, 2017
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Burrell Mining Products, Inc.
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Michael T. Shook
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E21 - EARTH DRILLING MINING
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Inflatable air barriers
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Patent number 9,562,432
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Issue date Feb 7, 2017
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Rite-Hite Holding Corporation
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Frank Heim
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E21 - EARTH DRILLING MINING
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Method of opening a mine door leaf
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Patent number 9,341,061
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Issue date May 17, 2016
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Jack Kennedy Metal Products and Buildings, Inc.
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William R. Kennedy
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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-
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Mine stopping and braces therefor
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Patent number 6,846,132
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Issue date Jan 25, 2005
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Jack Kennedy Metal Products and Buildings, Inc.
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William R. Kennedy
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E21 - EARTH DRILLING MINING
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Mine stopping
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Patent number 6,457,906
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Issue date Oct 1, 2002
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Jack Kennedy Metal Products and Buildings, Inc.
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William R. Kennedy
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E21 - EARTH DRILLING MINING
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Mine door power drive system
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Patent number 6,425,820
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Issue date Jul 30, 2002
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Jack Kennedy Metal Products and Buildings, Inc.
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William R. Kennedy
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E21 - EARTH DRILLING MINING
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-
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Door system for a mine stopping
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Patent number 6,032,986
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Issue date Mar 7, 2000
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Jack Kennedy Metal Products and Buildings
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William R. Kennedy
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Power mine door system
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Patent number 5,240,349
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Issue date Aug 31, 1993
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Jack Kennedy Metal Products and Buildings, Inc.
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William R. Kennedy
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Power mine door system
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Patent number 5,222,838
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Issue date Jun 29, 1993
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Jack Kennedy Metal Products and Buildings
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William R. Kennedy
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E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
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Mine door system
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Patent number 4,911,577
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Issue date Mar 27, 1990
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Jack Kennedy Metal Products, Inc.
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William R. Kennedy
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E21 - EARTH DRILLING MINING
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Mine ventilation door
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Patent number 4,517,767
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Issue date May 21, 1985
-
Frederick J. Dewson
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E21 - EARTH DRILLING MINING
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3906670
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Patent number 3,906,670
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Issue date Sep 23, 1975
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E21 - EARTH DRILLING MINING
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3747503
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Patent number 3,747,503
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Issue date Jul 24, 1973
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E21 - EARTH DRILLING MINING
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3206187
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Patent number 3,206,187
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Issue date Sep 14, 1965
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E21 - EARTH DRILLING MINING
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2968507
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Patent number 2,968,507
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Issue date Jan 17, 1961
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E21 - EARTH DRILLING MINING
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2738179
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Patent number 2,738,179
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Issue date Mar 13, 1956
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E21 - EARTH DRILLING MINING