| All Patents in class 408/234 |
Patents 16 -
30
of 109
      |
| Number | Date | Patentee | Title | Type |
| 438,014 | Oct. 07, 1890 | B.G. Luther | Drilling-machine | drill presses |
| 514,719 | Feb. 13, 1894 | C.L. Libby | Boring-Mill | vertical boring mills |
| 520,079 | May 22, 1894 | A.D. Quint | Turret-head machine | drill presses |
| 543,267 | Jul. 23, 1895 | E.B. Petrie | Drill Brace | drill accessories |
| 543,625 | Jul. 30, 1895 | R.H. Henderson, J.G. Henderson | Machine for Boring Joists for Electric Wiring | portable timber borers |
| 688,508 | Dec. 10, 1901 | A.H. Gang | Drilling machinery | radial drill presses |
| 943,009 | Dec. 14, 1909 | J.H. Dorman | Tapping and drilling tool | tapping heads and chucks |
| 1,035,143 | Aug. 13, 1912 | W.J. Bayrer | Clamping device | drill presses |
| 1,088,965 | Mar. 03, 1914 | E.P. Bullard, Jr. | Adjustable Observation-Stop | metalworking machine mechanisms |
| 1,095,828 | May 05, 1914 | H. Dreses, E.J. Spaeth | Radial drill | radial drill presses |
| 1,254,933 | Jan. 29, 1918 | A. Abbey, E. Peuch | Drilling, Screw Cutting , and Other Similar Machine | drill press chucks |
| 1,305,872 | Jun. 03, 1919 | B. Bollie | Micrometer Drilling Gage | special purpose gauges |
| 1,328,429 | Jan. 20, 1920 | J.C. Haldeman | Arm-binder and elevating-control-shaft lock | drill presses |
| 1,354,488 | Oct. 05, 1920 | J. Jewsbury | Radial-arm drilling-machine | radial drill presses |
| 1,376,791 | May 03, 1921 | F.W. Franklin, W.W. Baker | Self Centering Tool Holder | metalworking machine tool holders |
