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3744202
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Issue date Jul 10, 1973
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E04 - BUILDING
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3605366
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Patent number 3,605,366
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Issue date Sep 20, 1971
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E04 - BUILDING
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3494088
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Issue date Feb 10, 1970
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E04 - BUILDING
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E04 - BUILDING
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2691292
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Patent number 2,691,292
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E04 - BUILDING
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E04 - BUILDING
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Patent number 1,824,091
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Issue date Sep 22, 1931
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E04 - BUILDING