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| Patents Granted on 1958-05-13 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,834,160 | May 13, 1958 | G.E. Lillie | Grinding machine | grinders | |
| 2,834,221 | May 13, 1958 | C.O. Lassy | Vise lock | metalworking machine vises | |
| 2,834,223 | May 13, 1958 | J.J. Strnad | Adjustable eccentric | metalworking machine mechanisms | |