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| Patents Granted on 1952-04-22 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,594,057 | Apr. 22, 1952 | A.A. Muehling | Universal chuck vice | ||
| 2,594,155 | Apr. 22, 1952 | G.A. Guernsey, K.A. Harmon | Brake-holder control mechanism | vehicle brakes | |
| 2,594,224 | Apr. 22, 1952 | C.H. Schowalter | Gas Engine | gas and gasoline engines | |