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Warren S. Ecker
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Delray Beach, FL, US
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Patent Grant
Method for fabricating a compound portal frame extrusion profile
Patent number
4,694,552
Issue date
Sep 22, 1987
Ecker Mfg. Corp.
Warren S. Ecker
E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS