| Patents Granted on 1957-04-16 |
Patents 1 -
5
of 5
      |
| Number | Date | Patentee | Title | Type |
| 2,788,675 | Apr. 16, 1957 | E.E. Hosea | Preselect Automatic Change Speed Gear Shift | metalworking speed changing mechanisms |
| 2,788,690 | Apr. 16, 1957 | E.T. Able | Socket Wrench Having Reinforcing Rims Spaced from Wrench-Receiving and Nut-Receiving Socket Walls | wrench sockets |
| 2,788,716 | Apr. 16, 1957 | E.L. McFerren | Machine Tool Frame and Way Construction | metalworking machine mechanisms |
| 2,788,718 | Apr. 16, 1957 | M.E. Martellotti | Contouring Machine | profiling machines |
| 2,789,165 | Apr. 16, 1957 | J.R. Nichols | Program Control Mechanism | machine tool controls |
