| All Patents in class 408/48 |
Patents 1 -
8
of 8
      |
| Picture | Number | Date | Patentee | Title |
| | 104,337 | Jun. 14, 1870 | W. Morstatt | Boring Wood |
 | 274,020 | Mar. 13, 1883 | J.M. Nash | Wood-boring machine |
 | 526,198 | Sep. 18, 1894 | W. Brodie, G.W. Pringle | Boring-machine |
| | 558,497 | Apr. 21, 1896 | A.W. Kinney | Drilling Machine |
 | 614,378 | Nov. 15, 1898 | W.R. Fox | Automatic rim-drilling machine |
| | 1,146,768 | Jul. 13, 1915 | E.W. Cleveland | Multiple Spindle Drill Head |
 | 1,210,450 | Jan. 02, 1917 | W.R. Fox | Attachment for multiple drills |
 | 1,452,172 | Apr. 17, 1923 | R.F. Scott | Drill-spindle-adjusting mechanism |
