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Hexagonal pad
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Patent number 5,183,297
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Issue date Feb 2, 1993
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Minnesota Mining and Manufacturing
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Douglas P. Bodziak
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Binding system
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Patent number 5,013,200
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Issue date May 7, 1991
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Ray A. Hunder
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Hexagonal pad
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Patent number 5,011,186
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Issue date Apr 30, 1991
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Minnesota Mining and Manufacturing Company
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Douglas P. Bodziak
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Cover for binding sheets
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Patent number 4,793,758
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Issue date Dec 27, 1988
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Minnesota Mining and Manufacturing Company
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Gary R. Hanson
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER