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Resealable, returnable envelope
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Patent number 5,213,258
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Issue date May 25, 1993
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Myun H. Kim
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Tear strip opening device
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Patent number RE34024
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Issue date Aug 11, 1992
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Myun H. Kim
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229 - Envelopes, wrappers, and paperboard boxes
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Tear strip opening device
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Patent number 5,035,329
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Issue date Jul 30, 1991
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Myun H. Kim
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL
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Tear strip opening device
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Patent number 4,795,035
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Issue date Jan 3, 1989
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Myun H. Kim
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B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL