KOZO ISHIZAKI

Patent Owner

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6485533 Porous grinding stone and method of production thereofExpiredJul 31, 00Nov 26, 02[B24D]
5126103 Process for modifying porous material having open cellsExpiredApr 08, 91Jun 30, 92[G22F]

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