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J B Sash & Door Co., Inc.
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Chelsea, MA, US
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Patent Grant
Window construction with simplified plastic extrusions and interact...
Patent number
6,244,000
Issue date
Jun 12, 2001
J B Sash & Door Co., Inc.
Ugo Bertolami
E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS
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