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Patent number 6,337,440
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Issue date Jan 8, 2002
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David Ions
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Recoverable article
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Patent number 6,230,746
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Issue date May 15, 2001
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David Ions
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Recoverable article
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Patent number 6,189,575
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Issue date Feb 20, 2001
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David Ions
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL