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Muntin bar clip with spikes
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Patent number 6,494,002
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Issue date Dec 17, 2002
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Gerald G. Gieseke
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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Muntin bar clip
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Patent number 6,131,356
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Issue date Oct 17, 2000
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Gerald G. Gieseke
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS