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Dental attachment
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Patent number 5,931,676
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Issue date Aug 3, 1999
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Aichi Steel Works, Ltd.
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Yoshinobu Honkura
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Dental magnetic attachment
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Patent number 5,678,998
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Issue date Oct 21, 1997
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Aichi Steel Works, Ltd.
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Yoshinobu Honkura
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Soft magnetic Cr-Al steel
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Patent number 4,957,699
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Issue date Sep 18, 1990
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Aichi Steel Works Ltd.
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Yoshinobu Honkura
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...