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John Sells
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Columbus, OH, US
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last 30 patents
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Patent Grant
Protection device for roof openings
Patent number
7,300,037
Issue date
Nov 27, 2007
Winchester Fabricators, Inc.
D. Peter Beirne, Jr.
E04 - BUILDING
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last 30 patents
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Patent Application
Protection device for roof and floor openings
Publication number
20040232402
Publication date
Nov 25, 2004
D. Peter Beirne
E04 - BUILDING