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Magnetic window cleaning apparatus
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Patent number 4,977,637
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Issue date Dec 18, 1990
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Rodney C. Demers
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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3778173
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Patent number 3,778,173
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Issue date Dec 11, 1973
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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3759621
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Patent number 3,759,621
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Issue date Sep 18, 1973
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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3201816
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Patent number 3,201,816
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Issue date Aug 24, 1965
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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2285412
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Patent number 2,285,412
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Issue date Jun 9, 1942
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...