| All Patents in class 409/231 |
Patents 1 -
15
of 49
      |
| Number | Date | Patentee | Title | Type |
| 633,108 | Sep. 12, 1899 | W.B. Pearson | Machine for Turning Regular Hexagons | lathe tool holders and tool posts |
| 642,712 | Feb. 06, 1900 | J. Parker | High Speed Attachment for Milling Machines | milling machine accessories |
| 729,896 | Jun. 02, 1903 | V. Royle | Cutter-head for routing-machines | routing machines |
| 1,013,847 | Jan. 02, 1912 | D.B. Salstrom | Spindle-bearing | carving machines |
| 1,188,339 | Jun. 20, 1916 | J.B. Sinderson | Milling-machine | milling machines |
| 1,300,163 | Apr. 08, 1919 | W.F. Groene | Means for attaching tools to spindles | milling machines |
| 1,492,545 | Apr. 29, 1924 | S. Einstein | Cone Drive Miller Having Box Type Over-Arm | milling machines |
| 1,688,534 | Oct. 23, 1928 | S. Einstein | Vaiable Speed Spindle Drive | milling machines |
| 1,729,286 | Sep. 24, 1929 | J.B. Elfring | Adjustable Spacing Collar for Milling Cutters | milling machines |
| 1,761,841 | Jun. 03, 1930 | L.F. Nenninger | Milling Machine | milling machines |
| 1,938,782 | Dec. 12, 1933 | R.W. Ott | Milling Machine Spindle Carrier | metalworking power transmission |
| 1,985,434 | Dec. 25, 1934 | H.J. Dods, E.D. Vancil | Milling Machine | milling machines |
| 2,013,492 | Sep. 03, 1935 | G. Gorton | Brake for Rotary Spindle Machine Tools and the Like | milling machines |
| 2,033,749 | Mar. 10, 1936 | J.M. Walter | Milling machine head | milling machines |
| 2,034,221 | Mar. 17, 1936 | J.B. Armitage | Milling Machine | milling machines |
