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Active agent delivery device
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Patent number 4,959,208
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Issue date Sep 25, 1990
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PPG Industries, Inc.
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Paritosh M. Chakrabarti
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Artificial flower
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Patent number 4,957,787
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Issue date Sep 18, 1990
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PPG Industries, Inc.
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Linda P. Reinhardt
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL