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| Patents Granted on 1940-03-12 | |||||
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| Number | Date | Patentee | Title | Type | |
| D119,441 | Mar. 12, 1940 | W.A. Sandy | Battery Pliers | wrench handle components | |
| 2,192,888 | Mar. 12, 1940 | J.Y. Blazek, V.R. Roy | Resurfacing machine | vehicle brakes | |
| 2,192,978 | Mar. 12, 1940 | V.C. Macnabb | Radio Apparatus | radios | |
| 2,193,127 | Mar. 12, 1940 | G.H. Hansen, W.C. Furnas | Switch Assembly | pneumatic operated electric switches | |
| 2,193,279 | Mar. 12, 1940 | W.F. Groene, H.C. Kemper, H.E. Darby | Lathe headstock | metal lathe mechanisms | |