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Molded binder assembly
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Patent number 5,782,569
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Issue date Jul 21, 1998
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Duo-Tang, Inc.
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Howard Mullin
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Hinge binder device
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Patent number 5,425,592
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Issue date Jun 20, 1995
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Duo-Tang, Inc.
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Howard Mullin
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Molded binder assembly
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Patent number 5,393,156
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Issue date Feb 28, 1995
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Duo-Tang, Inc.
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Howard R. Mullin
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER