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Easy open type can
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Patent number 4,712,706
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Issue date Dec 15, 1987
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Hokkai Can Co., Ltd.
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Akira Nakata
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Container closure members
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Patent number 4,212,409
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Issue date Jul 15, 1980
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AB Akerlund & Rausing
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Jan-Bertil Jeppsson
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3720349
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Patent number 3,720,349
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Issue date Mar 13, 1973
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...