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3864888
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Patent number 3,864,888
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Issue date Feb 11, 1975
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E04 - BUILDING
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3708929
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Patent number 3,708,929
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Issue date Jan 9, 1973
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E04 - BUILDING
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1785050
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Patent number 1,785,050
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Issue date Dec 16, 1930
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E04 - BUILDING
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1065449
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Patent number 1,065,449
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Issue date Jun 24, 1913
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E04 - BUILDING