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Easily-openable packaging container
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Patent number 5,319,910
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Issue date Jun 14, 1994
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Idemitsu Petrochemical Co., Ltd.
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Yukio Takata
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Easily-openable packaging container
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Patent number 5,178,293
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Issue date Jan 12, 1993
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Idemitsu Petrochemical Co., Ltd.
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Takanori Suzuki
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Easily-openable packaging container
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Patent number 5,092,469
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Issue date Mar 3, 1992
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Idemitsu Petrochemical Co., Ltd.
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Yukio Takata
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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