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Twin cyclone vacuum cleaner
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Patent number 8,291,545
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Issue date Oct 23, 2012
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Royal Appliance Mfg., Co.
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Bengt Ivar Anders Ivarsson
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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Twin cyclone vacuum cleaner
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Patent number 7,921,508
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Issue date Apr 12, 2011
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Royal Appliance Mfg. Co.
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Bengt Ivar Anders Ivarsson
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B04 - CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL...
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Suction cleaner
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Patent number 7,904,991
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Issue date Mar 15, 2011
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Techtronic Industries Company Limited
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Bengt Ivar Anders Ivarsson
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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Suction cleaners
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Patent number 7,631,396
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Issue date Dec 15, 2009
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Techtronic Industries Company Limited
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Bengt Ivar Anders Ivarsson
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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Twin cyclone vacuum cleaner
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Patent number 7,410,516
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Issue date Aug 12, 2008
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Royal Appliance Mfg. Co.
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Bengt Ivar Anders Ivarsson
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...