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Patent number 7,475,488
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Issue date Jan 13, 2009
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Stephen Symington
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Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
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3824666
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Patent number 3,824,666
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Issue date Jul 23, 1974
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E04 - BUILDING
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3775929
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Patent number 3,775,929
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Issue date Dec 4, 1973
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E04 - BUILDING
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3744141
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Patent number 3,744,141
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Issue date Jul 10, 1973
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E04 - BUILDING
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3540548
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Patent number 3,540,548
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Issue date Nov 17, 1970
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E04 - BUILDING
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3187545
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Patent number 3,187,545
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Issue date Jun 8, 1965
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2873635
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Patent number 2,873,635
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Issue date Feb 17, 1959
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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2770043
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Patent number 2,770,043
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Issue date Nov 13, 1956
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E04 - BUILDING