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| Patents Granted on 1957-12-03 | |||||
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| Number | Date | Patentee | Title | Type | |
| D181,598 | Dec. 03, 1957 | F.E. Munschauer, Jr., R.G. Beiter | Circular shear | metal shearing machines | |
| 2,814,959 | Dec. 03, 1957 | F.L. Dodge | Variable speed drive | metal lathes | |
| 2,814,964 | Dec. 03, 1957 | C.H. Werth | Contour boring and turning machine | vertical boring mills | |
| 2,815,040 | Dec. 03, 1957 | R.V. Smith | Pressure relief valve | steam safety valves | |