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Standing seam panel clips
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Patent number 8,091,312
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Issue date Jan 10, 2012
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Harold Simpson, Inc.
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Harold G. Simpson
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E04 - BUILDING
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Zone based roofing system
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Patent number 6,588,170
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Issue date Jul 8, 2003
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Harold Simpson, Inc.
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Harold G. Simpson
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E04 - BUILDING
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Roof support apparatus
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Patent number 5,857,292
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Issue date Jan 12, 1999
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Harold Simpson, Inc.
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Harold G. Simpson
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E04 - BUILDING
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Standing seam assembly
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Patent number 5,737,894
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Issue date Apr 14, 1998
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Harold Simpson, Inc.
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Harold G. Simpson
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E04 - BUILDING
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