| All Patents in class 451/17 |
Patents 1 -
10
of 12
      |
| Picture | Number | Date | Patentee | Title |
| | 208,712 | Oct. 08, 1878 | E. Brown | Machine for Turning Needle Blanks |
 | 732,184 | Jun. 30, 1903 | B.M. Hanson | Dimensioning apparatus |
 | 781,434 | Jan. 31, 1905 | A.B. Landis | Automatic sizing mechanism for grinding-machines |
| | 1,535,080 | Apr. 21, 1925 | H.K. Spencer | Means For Controlling Feeding Mechanisms |
| | 1,763,201 | Jun. 10, 1930 | F.D. Van Norman | Magnetic throw-off for grinding machines |
| | 1,891,662 | Dec. 20, 1932 | F.S. Haas, C. Booth | Machine Tool |
 | 1,926,603 | Sep. 12, 1933 | B.F. Stowell | Automatic feed for grinding machines |
| | 1,991,953 | Feb. 19, 1935 | L.F. Nenninger | Grinding Machine |
| | 2,042,257 | May 26, 1936 | C.W. Hopkins, R.E. Harrison | Machine Tool |
 | 2,149,409 | Mar. 07, 1939 | F.D. Van Norman, B.F. Stowell, R.S. Pyne | Oscillating grinder |
