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| Patents for Theodore J. Langevin | |||||
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| Number | Date | Patentee | Title | Type | |
| 4,630,214 | Dec. 16, 1986 | D.A. Winski, H.W. Lawson, Jr., T.J. Langevin, K.S. Barney | Jig Grinder With Automatic Reciprocation and Outfeed Control | jig grinders | |