Hitchi Seiki Co., Ltd.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5930141 Method of controlling access to storage means in numerical-control system, and numerical-control systemExpiredNov 20, 96Jul 27, 99[G05B]
4982970 Claw unit with paired separably connected claw elementsExpiredJul 14, 88Jan 08, 91[B23B]
4821402 NC lathe with robot for automatically exchanging work and chuck clawExpiredMar 25, 85Apr 18, 89[B23Q]
4788636 Interactive device for entering graphic dataExpiredMay 06, 86Nov 29, 88[G05F]
4672551 Die machining apparatus in automatic programmingExpiredMay 10, 85Jun 09, 87[G05B, G06F]

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