| All Patents in class 144/104 |
Patents 16 -
30
of 31
      |
| Number | Date | Patentee | Title | Type |
| 364,254 | Jun. 07, 1887 | J.B. Higdon | Wood-boring machine | drilling and boring |
| 424,565 | Apr. 01, 1890 | P. Miller | Auger | portable timber mortisers |
| 464,646 | Dec. 08, 1891 | N.A. Chaney | Portable chain-mortising machine | portable timber mortisers |
| 578,209 | Mar. 02, 1897 | H.A. Carlson | Hollow auger | hollow bits |
| 579,037 | Mar. 16, 1897 | A.E. McLauchlin, C.O. Bulock | Centering Machine | horizontal drilling machines |
| 610,455 | Sep. 06, 1898 | J. McSweeny | Hand-drill | hand drills |
| 614,848 | Nov. 29, 1898 | T.J. Doran | Hand-operated drill | drill presses |
| 702,217 | Jun. 10, 1902 | H.R. Jacobs | Drill | drill presses |
| 775,745 | Nov. 22, 1904 | D.W. Cole | Portable chain mortising machine | portable timber mortisers |
| 960,718 | Jun. 07, 1910 | F. Schtabe | Level Attachment for Drills | levels |
| 966,217 | Aug. 02, 1910 | F.W. King | Electric drill | drill presses |
| 1,910,768 | May 23, 1933 | C.F. Hotchkiss | Boring Tool | plumber |
| 2,176,572 | Oct. 17, 1939 | T.L. Hedgpeth | Power driven tool | drill presses |
| 2,310,759 | Feb. 09, 1943 | I.C. Clawson | Drill with Adjustable Head | eggbeater drills |
| 2,681,673 | Jun. 22, 1954 | B.A. Mackey | Drill bit | wood drill bits |
