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Ball grinding machine
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Patent number 6,171,179
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Issue date Jan 9, 2001
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National Science Council
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Yuang-Cherng Chiou
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B24 - GRINDING POLISHING
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Sphere polisher
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Patent number 5,921,851
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Issue date Jul 13, 1999
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NSK Ltd.
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Tomita Suzuki
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B24 - GRINDING POLISHING
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Sphere polishing machine
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Patent number 5,913,717
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Issue date Jun 22, 1999
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NSK Ltd.
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Katsuhisa Tonooka
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B24 - GRINDING POLISHING
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Steel ball polishing apparatus
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Patent number 5,353,550
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Issue date Oct 11, 1994
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Isubakimoto Precision Products Co. Ltd.
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Tatsuo Iwai
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B24 - GRINDING POLISHING
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Ball lapping machine
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Patent number 5,301,470
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Issue date Apr 12, 1994
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NSK Ltd.
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Chuichi Sato
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B24 - GRINDING POLISHING
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3924356
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Patent number 3,924,356
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Issue date Dec 9, 1975
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B24 - GRINDING POLISHING