| Patents Granted on 1957-12-17 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 2,816,454 | Dec. 17, 1957 | A.T. Godschalx, E.E. Hosea | Positioning Means for Machine Tools | metalworking machine mechanisms |
| 2,816,462 | Dec. 17, 1957 | S.M. Babbitt | Precision boring machine | vertical boring mills |
| 2,816,485 | Dec. 17, 1957 | G.H. Schurger | Combination Operator Platform and Elevator for Machine Tools | metalworking machine mechanisms |
| 2,816,487 | Dec. 17, 1957 | J.L. Martin, H.L. Heywood, J.B. Armitage | Milling Machine | milling machines |
| 2,816,489 | Dec. 17, 1957 | L.W. Robbins, A.P. Smith | Sine plate | angle bars and angle plates |
| 2,816,767 | Dec. 17, 1957 | A.F. Pekrul | Tool Holder | metalworking machine tool holders |
| 2,816,768 | Dec. 17, 1957 | A.M. Stoner, G.S. Haviland | Lever operated collet chuck | metal lathe chucks |
| 2,816,770 | Dec. 17, 1957 | A.N. Sweeny, C.B. De Vlieg | Tool Holder and Adapter | metalworking machine tool holders |
