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| Patents Granted on 1951-03-20 | |||||
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| Number | Date | Patentee | Title | Type | |
| CA-472,347 | Mar. 20, 1951 | C.E. Greene | Turret lathes | turret lathes | |
| 2,545,453 | Mar. 20, 1951 | F.P. Forss | Portable rotary grinder or die filer | handheld power tools | |
| 2,545,676 | Mar. 20, 1951 | L. Small | Diamond impregnated dressing tool | grinder dressers | |
| 2,545,782 | Mar. 20, 1951 | A.C. Hugin | Micrometric Insulation Tester | measurement gauges | |
| 2,546,062 | Mar. 20, 1951 | H. Ernst | Torque Converter | milling machines | |