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| Patents Granted on 1957-04-23 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,789,314 | Apr. 23, 1957 | B.H. Davis | Apparatus for vulcanizing an extruded sheath on a continuous core | wire insulating machines | |
| 2,789,429 | Apr. 23, 1957 | J.B. Bidwell | Surface Gage Extension Probe | measurement gauges | |
| 2,789,551 | Apr. 23, 1957 | W.E. Armstrong | Pull Starter Guide Means | starters | |
| 2,789,599 | Apr. 23, 1957 | B.E. Porter, A.H. Stuart | Planer having work piece carrying belt | wood planers | |
| 2,789,606 | Apr. 23, 1957 | W.H. Solomon | Bread slicing machine | ||