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Cup with detachable bottom
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Patent number 4,432,153
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Issue date Feb 21, 1984
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Dittler Brothers, Inc.
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Gilbert Bachman
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Secure contest card
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Patent number 4,241,942
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Issue date Dec 30, 1980
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Dittler Brothers, Inc.
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Gilbert Bachman
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B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
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Secure contest card
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Patent number 4,095,824
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Issue date Jun 20, 1978
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Dittler Brothers, Inc.
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Gilbert Bachman
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G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS