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Orthodontic bracket
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Patent number 5,161,969
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Issue date Nov 10, 1992
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Minnesota Mining and Manufacturing Company
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Jirina V. Pospisil
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Orthodontic bracket
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Patent number D315957
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Issue date Apr 2, 1991
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Minnesota Mining and Manufacturing Company
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John S. Kelly
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D24 - Medical and laboratory equipment
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Triwing orthodontic bracket
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Patent number 4,927,360
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Issue date May 22, 1990
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Unitek Corporation
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Jirina V. Pospisil
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Orthodontic bracket
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Patent number 4,820,151
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Issue date Apr 11, 1989
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Unitek Corporation
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Jirina V. Pospisil
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE