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Oral cavity spreading apparatus
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Patent number 6,500,002
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Issue date Dec 31, 2002
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Sintobrator, Ltd.
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Shoji Horiguchi
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Polishing device
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Patent number 5,010,692
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Issue date Apr 30, 1991
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Sintobrator, Ltd.
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Takao Ishida
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B24 - GRINDING POLISHING
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Polishing device
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Patent number 4,839,992
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Issue date Jun 20, 1989
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Sintobrator, Ltd.
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Takeo Ishida
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B24 - GRINDING POLISHING
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Polishing device
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Patent number 4,837,979
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Issue date Jun 13, 1989
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Sintobrator, Ltd.
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Takao Ishida
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B24 - GRINDING POLISHING