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Apparatus for binding loose sheets
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Patent number 4,020,516
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Issue date May 3, 1977
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Spiral Binding Company, Inc.
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Albert Gomez
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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3334918
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Patent number 3,334,918
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Issue date Aug 8, 1967
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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2371566
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Patent number 2,371,566
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Issue date Mar 13, 1945
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER