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Sheath heater
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Patent number 4,950,873
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Issue date Aug 21, 1990
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Sumitomo Metal Industries, Ltd.
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Yoshiaki Shida
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Swaged metal denture base
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Patent number 4,824,373
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Issue date Apr 25, 1989
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Sankin Industry Co.
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Minoru Okada
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Sheath heater
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Patent number 4,742,324
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Issue date May 3, 1988
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Sumitomo Metal Industries Ltd.
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Yoshiaki Shida
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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