| All Patents in class 408/101 |
Patents 16 -
25
of 25
      |
| Number | Date | Patentee | Title | Type |
| 464,673 | Dec. 08, 1891 | H.P. Bradford | Drill for electric railways | rail drilling machines |
| 475,949 | May 31, 1892 | C.H. Platt | Drill Stock | eggbeater drills |
| 579,037 | Mar. 16, 1897 | A.E. McLauchlin, C.O. Bulock | Centering Machine | horizontal drilling machines |
| 667,080 | Jan. 29, 1901 | B. Gallagher | Drilling-machine | drilling and boring |
| 714,939 | Dec. 02, 1902 | S. McClellan | Combined bit-brace and chain and bench drill | |
| 805,838 | Nov. 28, 1905 | P. Broadbooks | Combination Drill and Drill Frame | handheld power drills |
| 1,087,794 | Feb. 17, 1914 | G.O. Leopold | Bench-drill | drill presses |
| 1,282,079 | Oct. 22, 1918 | W.A. Hawkins | Convertible Drilling Machine and Gear Jack | portable metal drilling machines |
| 1,339,958 | May 11, 1920 | K.W. Karlsson | Feeding attachment for bit-stocks | |
| 1,584,071 | May 11, 1926 | G.A. Arnold | Drill supporting and feeding apparatus | handheld power drills |
