| All Patents in class 409/221 |
Patents 16 -
30
of 56
      |
| Number | Date | Patentee | Title | Type |
| 1,737,002 | Nov. 26, 1929 | C.B. De Vlieg | Rotatable Work Table | milling machine accessories |
| 1,797,139 | Mar. 17, 1931 | G. Gorton | Engraving Machine and the Like | metal engraving machines |
| 1,868,016 | Jul. 19, 1932 | O.A. Olsen, N.M. Marsilius | Milling machine | milling machines |
| 1,909,766 | May 16, 1933 | W.M. Fairbairn, A.M. Johnson | Machine tool | tapping machines |
| 1,938,770 | Dec. 12, 1933 | W.D. Archea | Milling Machine | milling machines |
| 1,940,142 | Dec. 19, 1933 | R.W. Ott | Milling Machine | milling machines |
| 1,942,927 | Jan. 09, 1934 | C.O. Holland, A.M. Johnson | Hydraulically actuated indexing mechanism | indexers and dividers |
| 1,961,522 | Jun. 05, 1934 | L.F. Nenninger | Milling Machine | milling machines |
| 1,976,104 | Oct. 09, 1934 | W.D. Archea | Milling Machinery | milling machines |
| 2,141,263 | Dec. 27, 1938 | F.W. Curtis | Indexing Work Holder | indexers and dividers |
| 2,244,985 | Jun. 10, 1941 | J.J. Lenert, J.B. Armitage | Machine Tool | milling machines |
| 2,251,761 | Aug. 05, 1941 | L.L. Schauer | Spacing mechanism for machine tools | radial drill presses |
| 2,261,052 | Oct. 28, 1941 | A.L. Krause, E.E. Coffin | Machine Tool | milling machines |
| 2,335,721 | Nov. 30, 1943 | F.G. Zagar | Indexing chuck | indexers and dividers |
| 2,369,209 | Feb. 13, 1945 | E.P. Bullard, E.N. Cowell, P.H. Lange | Turrethead Locking Means | turret lathes |
