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Bruce R. Dendulk
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Ripon, CA, US
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last 30 patents
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Patent Grant
Progressive resistance lifting mechanism for a window covering
Patent number
7,331,370
Issue date
Feb 19, 2008
Shades Unlimited, Inc.
David R. Militello
E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS