Nissin Unyu Kogyo Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2006/0065,518 Method and apparatus for polishing an internal surface of an aluminum extrusion hollow shapeAbandonedNov 14, 05Mar 30, 06[C25D]
6994610 Method and apparatus for polishing inner an internal surface of an aluminum extrusion hollow shapeExpiredOct 05, 98Feb 07, 06[B24B]
6783439 Method for manufacturing mirror surface tube for photosensitive drum of copying machine or the likeExpiredOct 14, 99Aug 31, 04[B24B]
6322424 Electrolytic integrated polishing method for metal workpieces using special abrasive materialsExpiredOct 28, 99Nov 27, 01[B24B]
6322426 Method for mirror process of external surface of long sized metalExpiredOct 14, 99Nov 27, 01[B24B]
6156187 Electrolytic integrated polishing method for external surface of metallic tubes and photosensitive drum substrate prepared therebyExpiredJun 02, 99Dec 05, 00[C25F]

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