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| Patents for Singer Mfg. Co. | |||||
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| Number | Date | Patentee | Title | Type | |
| 1,416,694 | May 23, 1922 | A.L. De Leeuw | Gauge | measurement gauges | |
| 2,711,461 | Jun. 21, 1955 | R. Happe | Portable electric tool handle assemblies | handheld power drills | |