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Book binding process
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Patent number 4,019,758
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Issue date Apr 26, 1977
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Heller, Jr.; William C.
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William C. Heller
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Plastic hose making method
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Patent number 3,945,867
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Issue date Mar 23, 1976
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Heller, Jr.; William C.
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William C. Heller
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Bonding method and apparatus
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Patent number 3,941,641
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Issue date Mar 2, 1976
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Heller, Jr.; William C.
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William C. Heller
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL