Murata Wiedemann, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5201589 Marking tool holder for a punch pressExpiredFeb 14, 90Apr 13, 93[B41J]
5097734 Open frame punch press with punching reaction force neutralizing systemExpiredJul 25, 90Mar 24, 92[B21D]
5053600 Slag chute systemExpiredJul 25, 90Oct 01, 91[B23K]
5048816 Workpiece registration system and method for determining the position of a sheetExpiredJul 09, 90Sep 17, 91[B65H]
5047752 Safety system for a machine toolExpiredNov 14, 89Sep 10, 91[G08B]
5034592 Process and apparatus for reducing slag build-up on chute surfacesExpiredJul 09, 90Jul 23, 91[B23K]
4998958 Multitool punch holderExpiredJul 20, 90Mar 12, 91[B26F]
4993294 Punch holder with a stripper arrangementExpiredMay 15, 89Feb 19, 91[B26F]
4929276 Multitool punch holderExpiredMay 22, 89May 29, 90[B26F]
4865310 Stacker-sorter arrangement for sheet part piecesExpiredMay 16, 88Sep 12, 89[B65H]
4787282 Method and apparatus for forming by punchingExpiredAug 03, 87Nov 29, 88[B26V]
4608654 Linear position indicatorExpiredDec 13, 83Aug 26, 86[G05B, G06F]
4519284 Universal sheet metal holderExpiredJul 26, 82May 28, 85[B26D, B25B]
4515355 Sheet metal workholder utilizing linear wedge actionExpiredJun 21, 82May 07, 85[B23Q]
4503741 Bridge type punch pressExpiredJul 26, 82Mar 12, 85[B26D, B21J]
4478122 Punch head for a punch pressExpiredJul 26, 82Oct 23, 84[B26D]
4448099 Work handling methodExpiredDec 07, 81May 15, 84[B26D]
4341137 Material forming apparatusExpiredOct 02, 79Jul 27, 82[B26D, B30B]
4297927 Sheet metal positioning and gripping apparatus and methodExpiredMar 06, 80Nov 03, 81[B26D]

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