SLEEPYHEAD MANUFACTURING CO. LTD.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6948348 Method of arranging coils in a spring coil assemblyExpiredJan 05, 04Sep 27, 05[B21F]
6758078 Spring coil assembly and system for making the sameExpiredJun 20, 01Jul 06, 04[B21F, B21C]
6758079 Coil spring forming machineExpiredJun 20, 01Jul 06, 04[B21F]
6430982 Coil spring forming and conveying assemblyExpiredJan 03, 01Aug 13, 02[B21F]
5950473 Coil spring forming and conveying assemblyExpiredJan 09, 98Sep 14, 99[B21F, B21C]

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