| All Patents in class 408/117 |
Patents 16 -
30
of 41
      |
| Number | Date | Patentee | Title | Type |
| 708,177 | Sep. 02, 1902 | W.S. Sherman | Boring-machine | wood drilling and boring |
| 749,821 | Jan. 19, 1904 | T.C. Hansen | Drilling-machine | music instrument maker |
| 879,918 | Feb. 25, 1908 | W.S. Sherman | Boring-machine | wood drilling and boring |
| 1,032,410 | Jul. 16, 1912 | M. Himoff | Drill-press | drill presses |
| 1,058,045 | Apr. 08, 1913 | W.R. Fox | Multiple drill | multiple spindle drill presses |
| 1,079,023 | Nov. 18, 1913 | A.H. Reher | Multiple Spindle Drill Head | multiple spindle drilling heads |
| 1,146,768 | Jul. 13, 1915 | E.W. Cleveland | Multiple Spindle Drill Head | multiple spindle drilling heads |
| 1,210,450 | Jan. 02, 1917 | W.R. Fox | Attachment for multiple drills | multiple spindle drill presses |
| 1,212,472 | Jan. 16, 1917 | W.R. Fox | Attachment for multiple drills | multiple spindle drill presses |
| 1,285,651 | Nov. 26, 1918 | J.A. Eden, Jr. | Drill Machine | |
| 1,372,045 | Mar. 22, 1921 | R.G. Sedgewick | Valve grinder | handheld power tools |
| 1,475,153 | Nov. 20, 1923 | H. Athenas | Portable electric combination drill | handheld power drills |
| 1,591,585 | Jul. 06, 1926 | W.W. Vosper | Die Head | tap and die holders |
| 1,700,975 | Feb. 05, 1929 | J.F. Buhr | Drill Head | drill press accessories |
| 1,998,275 | Apr. 16, 1935 | G.W. Emrick | Multiple tapping device | tapping heads and chucks |
