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| Patents Granted on 1941-04-15 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,238,363 | Apr. 15, 1941 | H.A. Hadley | Electrical Impulse Weight Recorder | scales and balances | |
| 2,238,675 | Apr. 15, 1941 | R. Breuning | Adjustable Tool Holder | lathe tool holders and tool posts | |
| 2,238,704 | Apr. 15, 1941 | P.V. Miller | Surface Grinding Machine | surface grinders | |