Littell International, Inc.

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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Expired/Abandoned/Withdrawn Patents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
6360643 Blade assembly for shearExpiredFeb 18, 99Mar 26, 02[B26D, B23D]
6161460 Bearing assembly for shearExpiredFeb 09, 99Dec 19, 00[B26D, B27B]
6070781 System for bringing the joint edges of sheet material into butting relationship for weldingExpiredJul 29, 97Jun 06, 00[B23Q, B23K]
5951889 System and method for laser weldingExpiredJul 28, 97Sep 14, 99[B23K]
5932117 Clamping system for sheet material in a welding systemExpiredJul 29, 97Aug 03, 99[B23K]
5926967 System for gauging the position of joint edges for weldingExpiredJul 28, 97Jul 27, 99[G01B]
5901627 Apparatus and method for shearing materialExpiredAug 13, 96May 11, 99[B26D]
5814786 System and method for laser butt-weldingExpiredNov 08, 95Sep 29, 98[B23K]
4793464 Apparatus for inverting strips of sheet materialExpiredMar 14, 83Dec 27, 88[B65G]
4782664 Thermoelectric heat exchangerExpiredFeb 03, 88Nov 08, 88[F25B]
D294566 Control panel for a machine control systemExpiredApr 02, 85Mar 08, 88[]
4697231 Machine control systemExpiredJun 21, 85Sep 29, 87[G06F]
4643634 Work piece transporting apparatusExpiredAug 12, 83Feb 17, 87[B23Q]
4561582 Strip feedersExpiredJul 26, 82Dec 31, 85[B65H]
4559900 Device for coating strip materialExpiredMar 01, 84Dec 24, 85[B05C]
4304114 Process of rolling automobile rimsExpiredApr 19, 78Dec 08, 81[B21H, B21D]
4222256 Straightener with individually removable roll and pivoted bearing housing and roll designExpiredFeb 21, 79Sep 16, 80[B21D]

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