| Patents Granted on 1957-12-31 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 2,817,902 | Dec. 31, 1957 | E.L. Allman, Sr. | Adjustable Tool Holder | metalworking machine tool holders |
| 2,817,982 | Dec. 31, 1957 | W.G. Hoelscher | Self Equalizing Head Clamping Mechanism | metalworking machine mechanisms |
| 2,817,990 | Dec. 31, 1957 | C.E. Miller | Automatic Lathe | automatic lathes |
| 2,817,992 | Dec. 31, 1957 | J. Gaynor | Radius Turning Mechanism | metalworking machine mechanisms |
| 2,818,002 | Dec. 31, 1957 | J.J. Lenert, O.W. Barker | Transfer Machines | milling machines |
| 2,818,115 | Dec. 31, 1957 | C.E. Parker | Veneer clipper | veneer machines |
| 2,818,147 | Dec. 31, 1957 | W. Ziegler, C.A. Mattson, A.W. Mall | Engine governor and clutch | industrial machine clutches |
