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Clean room wall system
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Patent number 6,155,014
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Issue date Dec 5, 2000
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Unistrut Insternational Corporation
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S. Ross Wagner
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E04 - BUILDING
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Wall construction
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Patent number 3,961,452
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Issue date Jun 8, 1976
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Kawneer Company, Inc.
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S. Eugene Hubbard
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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3628299
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Patent number 3,628,299
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Issue date Dec 21, 1971
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E04 - BUILDING
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3261625
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Patent number 3,261,625
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Issue date Jul 19, 1966
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E04 - BUILDING
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1791197
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Patent number 1,791,197
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Issue date Feb 3, 1931
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E04 - BUILDING