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Ultrasonic dental scaler insert
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Patent number 6,086,369
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Issue date Jul 11, 2000
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Parkell Products, Inc.
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Michael C. Sharp
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Air-abrading tool
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Patent number 5,941,702
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Issue date Aug 24, 1999
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Parkell Products, Inc.
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Michael C. Sharp
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Polymeric composition
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Patent number 5,718,586
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Issue date Feb 17, 1998
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Parkell Products, Inc.
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Michael C. Sharp
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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