| All Patents in class 74/665R |
Patents 16 -
30
of 35
      |
| Number | Date | Patentee | Title | Type |
| 1,253,594 | Jan. 15, 1918 | J.B. Hasty | Drilling Machine | drill presses |
| 1,326,398 | Dec. 30, 1919 | B.P. Fortin | Multiple-tool-head for drill-presses | drill presses |
| 1,367,945 | Feb. 08, 1921 | H.B. Brueggemann | Multiple-spindle boring-machine | wood drilling and boring |
| 1,394,709 | Oct. 25, 1921 | J.F. Buhr | Drill Head | drill press accessories |
| 1,428,002 | Sep. 05, 1922 | J.F. Buhr | Drill Head for Drilling Machines | drill press accessories |
| 1,453,008 | Apr. 24, 1923 | W.R. Fox, H.D. Corwin | Multiple-drilling machine | |
| 1,470,735 | Oct. 16, 1923 | J.A. Wilding, G. Hey | Multiple Spindle Drill Head | multiple spindle drilling heads |
| 1,481,054 | Jan. 15, 1924 | W.R. Fox | Multiple-speed driving mechanism for drilling machines | |
| 1,525,091 | Feb. 03, 1925 | A.C. Savidge | Multiple Drill Attachment | multiple spindle drilling heads |
| 1,526,282 | Feb. 10, 1925 | S.C. Smith, G. Hey | Multiple Spindle Drill Head | multiple spindle drilling heads |
| 1,696,468 | Dec. 25, 1928 | J.F. Buhr | Multiple-spindle drill head | multiple spindle drill presses |
| 2,012,047 | Aug. 20, 1935 | J.R. Johnson | Boring Head | boring heads |
| 2,096,754 | Oct. 26, 1937 | A. Oberhoffken | Machine Tool | milling machines |
| 2,183,743 | Dec. 19, 1939 | C.A. Hoefer | Multiple Spindle Machine Tool | multiple spindle drill presses |
| 2,213,579 | Sep. 03, 1940 | G.W. Emrick | Variable multiple head | multiple spindle drilling heads |
