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Dry powder inhalation device
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Patent number 6,012,454
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Issue date Jan 11, 2000
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Minnesota Mining and Manufacturing Company
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Peter David Hodson
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Dry powder inhalers
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Patent number 5,482,032
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Issue date Jan 9, 1996
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Astra Aktiebolag
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David K. Smith
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Inhaler
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Patent number 5,069,204
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Issue date Dec 3, 1991
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Riker Laboratories, Inc.
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David K. Smith
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE