Inventor

KERSJES DAVID

US3 patents

Patents

3 patents

US6419332B1Jul 16, 2002

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HARBOR STEEL & SUPPLY CORP38 citations87

US6588865B2Jul 8, 2003

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HARBOR STEEL & SUPPLY CORP12 citations69

US6830159B2Dec 14, 2004

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HARBOR STEEL & SUPPLY CORP6 citations57