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Suspension device for ring binders
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Patent number 4,208,146
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Issue date Jun 17, 1980
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Robert Krause KG
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Karl-Hein Schudy
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Filing device for papers
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Patent number 4,070,073
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Issue date Jan 24, 1978
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Robert Krause KG
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Karl-Heinz Schudy
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Ring binder
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Patent number 4,019,823
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Issue date Apr 26, 1977
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Robert Krause KG
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Heinz Kleinert
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Filling device for papers
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Patent number 3,993,374
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Issue date Nov 23, 1976
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Robert Krause KG
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Karl-Heinz Schudy
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Filing device for papers
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Patent number 3,977,799
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Issue date Aug 31, 1976
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Robert Krause KG
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Karl-Heinz Schudy
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER