IBIGAWA ELECTRIC INDUSTRY CO., LTD.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4555615 Carbon rod assembly for arc gouging and blasting of metallic articleExpiredAug 06, 84Nov 26, 85[B23K]
4327067 Method for refining metal carbides containing free carbonExpiredJan 02, 80Apr 27, 82[C01B]
4292276 Apparatus for producing silicon carbideExpiredMar 09, 79Sep 29, 81[H05B, C01D]
4238434 Method of producing a silicon carbide sintered bodyExpiredFeb 02, 79Dec 09, 80[C01B, C04B]
4194914 Heat-resisting ceramic fibers and method for manufacture thereofExpiredFeb 27, 78Mar 25, 80[C09K]

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