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| US4378261 | 8 Jun 1981 | 29 Mar 1983 | General Electric Company | Methods for fabricating electrical phase insulators for dynamoelectric machines |
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| US5049219 | 6 Mar 1990 | 17 Sep 1991 | DeRoyal Industries, Inc. | Method and apparatus for manufacturing surgical sponges |
| US7431783 | 9 Apr 2003 | 7 Oct 2008 | Lafarge Platres | Method and apparatus for production of plaster plates having 4 tapered edges |
