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| Patents Granted on 1942-03-31 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,278,262 | Mar. 31, 1942 | W.G. Hoelscher | Counterweight Mechanism for Drill Spindles | metalworking machine mechanisms | |
| 2,278,263 | Mar. 31, 1942 | W.G. Hoelscher | Speed Indicator Means | metal lathe mechanisms | |