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| Patents Granted on 1958-03-04 | |||||
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| Number | Date | Patentee | Title | Type | |
| 2,825,268 | Mar. 04, 1958 | G. De Mambro, A.M. De Mambro | Safety shield | ||
| 2,825,307 | Mar. 04, 1958 | N.V. Gusching, D.B. Enyeart | Hydraulic control system | ||
| 2,825,827 | Mar. 04, 1958 | F.O. Luenberger | Ventilated electric motors | motor cooling | |