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Double wall tank system
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Patent number 5,167,352
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Issue date Dec 1, 1992
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Howard J. Robbins
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Tank secondary containment system
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Patent number 5,154,312
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Issue date Oct 13, 1992
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Howard J. Robbins
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Tank secondary containment system
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Patent number 4,871,084
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Issue date Oct 3, 1989
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Howard J. Robbins
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Double wall tank manway system
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Patent number 4,685,585
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Issue date Aug 11, 1987
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Howard J. Robbins
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL