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Straddling stackable stud
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Patent number 4,222,211
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Issue date Sep 16, 1980
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National Gypsum Company
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Robert J. Pearson
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E04 - BUILDING
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3841051
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Patent number 3,841,051
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Issue date Oct 15, 1974
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E04 - BUILDING
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3841047
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Patent number 3,841,047
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Issue date Oct 15, 1974
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E04 - BUILDING
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3841043
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Patent number 3,841,043
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Issue date Oct 15, 1974
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E04 - BUILDING
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3789567
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Patent number 3,789,567
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Issue date Feb 5, 1974
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E04 - BUILDING
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3780481
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Patent number 3,780,481
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Issue date Dec 25, 1973
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E04 - BUILDING
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3538658
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Patent number 3,538,658
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Issue date Nov 10, 1970
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E04 - BUILDING
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3403491
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Patent number 3,403,491
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Issue date Oct 1, 1968
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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3349535
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Patent number 3,349,535
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Issue date Oct 31, 1967
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E04 - BUILDING
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3320710
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Patent number 3,320,710
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Issue date May 23, 1967
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E04 - BUILDING
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3229435
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Patent number 3,229,435
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Issue date Jan 18, 1966
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E04 - BUILDING
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3101817
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Patent number 3,101,817
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Issue date Aug 27, 1963
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E04 - BUILDING
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3075253
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Patent number 3,075,253
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Issue date Jan 29, 1963
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E04 - BUILDING
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3073420
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Patent number 3,073,420
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Issue date Jan 15, 1963
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E04 - BUILDING