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Hermetic sealed container with pull tab
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Patent number 4,650,088
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Issue date Mar 17, 1987
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Toyo Seikan Kaisha, Limited
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Kazumi Hirota
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Easily-openable heat-seal lid
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Patent number 4,501,375
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Issue date Feb 26, 1985
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Toyo Seikan Kaisha, Ltd.
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Tadahiko Katsura
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Easily-openable heat seal lid
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Patent number 4,428,494
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Issue date Jan 31, 1984
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Toyo Seikan Kaisha, Ltd.
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Kazumi Hirota
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Easily-openable heat seal lid
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Patent number 4,403,710
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Issue date Sep 13, 1983
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Toyo Seikan Kaisha Ltd.
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Kazumi Hirota
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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Drawing apparatus
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Patent number 4,361,020
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Issue date Nov 30, 1982
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Toyo Seikan Kaisha, Limited
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Kazumi Hirota
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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