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Devices for stretching polymer films
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Patent number 7,316,558
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Issue date Jan 8, 2008
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3M Innovative Properties Company
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William W. Merrill
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Laminate bending device
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Patent number 5,020,985
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Issue date Jun 4, 1991
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Carlos M. Torres
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3770359
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Patent number 3,770,359
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Issue date Nov 6, 1973
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3718725
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Patent number 3,718,725
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Issue date Feb 27, 1973
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3070841
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Patent number 3,070,841
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Issue date Jan 1, 1963
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3032824
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Patent number 3,032,824
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Issue date May 8, 1962
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL