| Patents Granted on 1957-02-12 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 2,780,857 | Feb. 12, 1957 | W.E. Twamley | Tool Holder | metalworking machine tool holders |
| 2,780,893 | Feb. 12, 1957 | E.Y. Seborg, D.K. Greenberg | Honing machine | honing machines |
| 2,780,944 | Feb. 12, 1957 | E.J. Ondeck | Reversible drive for power tools | handheld power tool accessories |
| 2,780,945 | Feb. 12, 1957 | J.A. Wilhelm, J. McEwan | Saw sharpener | saw sharpening machines |
| 2,780,956 | Feb. 12, 1957 | P.N. Welch, L.B. Fuller | Circle Tolerance Gauge for Optical Comparators | comparators |
| 2,781,067 | Feb. 12, 1957 | R.C. Kaley | Safety device for rotary cutters | radial arm saws |
| 2,781,199 | Feb. 12, 1957 | A.G. Veldhuizen | Device for Clamping a Tool or a Disc on the Holder of a Machine Tool | metalworking machine tool holders |
