| All Patents in class 451/17 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 208,712 | Oct. 08, 1878 | E. Brown | Machine for Turning Needle Blanks | needle making machines |
| 732,184 | Jun. 30, 1903 | B.M. Hanson | Dimensioning apparatus | measuring tools |
| 781,434 | Jan. 31, 1905 | A.B. Landis | Automatic sizing mechanism for grinding-machines | grinders |
| 1,535,080 | Apr. 21, 1925 | H.K. Spencer | Means For Controlling Feeding Mechanisms | surface grinders |
| 1,763,201 | Jun. 10, 1930 | F.D. Van Norman | Magnetic throw-off for grinding machines | grinders |
| 1,891,662 | Dec. 20, 1932 | F.S. Haas, C. Booth | Machine Tool | grinding machines |
| 1,926,603 | Sep. 12, 1933 | B.F. Stowell | Automatic feed for grinding machines | grinders |
| 1,991,953 | Feb. 19, 1935 | L.F. Nenninger | Grinding Machine | grinding machines |
| 2,042,257 | May 26, 1936 | C.W. Hopkins, R.E. Harrison | Machine Tool | grinding machines |
| 2,149,409 | Mar. 07, 1939 | F.D. Van Norman, B.F. Stowell, R.S. Pyne | Oscillating grinder | grinders |
| 2,751,722 | Jun. 26, 1956 | H.F. Skillings | Gauging Device For Surface Grinder | grinding attachments |
| 3,877,179 | Apr. 15, 1975 | E. Hammann | Work Locating Device for Grinding Machines | grinding machines |
