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Artificial joint
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Patent number 5,092,898
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Issue date Mar 3, 1992
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NGK Spark Plug Co., Ltd.
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Katsutoshi Bekki
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Artificial bone joint
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Patent number 5,007,932
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Issue date Apr 16, 1991
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NGK Spark Plug Co., Ltd.
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Katsutoshi Bekki
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Artificial finger joint
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Patent number 4,944,758
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Issue date Jul 31, 1990
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NGK Spark Plug Co., Ltd.
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Katsutoshi Bekki
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE