| All Patents in class 408/138 |
Patents 16 -
26
of 26
      |
| Number | Date | Patentee | Title | Type |
| 453,767 | Jun. 09, 1891 | J. Addison | Tool for Cutting Holes and Washers | washer cutters |
| 537,719 | Apr. 16, 1895 | C.P. Russell | Post Drill | drill presses |
| 555,442 | Feb. 25, 1896 | W.L. Fifield | Chain Drill | drill chucks |
| 566,923 | Sep. 01, 1896 | W.J. Mewer | Chain Drill | brace chucks |
| 589,110 | Aug. 31, 1897 | T.L. Armstrong | Chain Drill | drill chucks |
| 650,795 | May 29, 1900 | W.T. Maxwell, G.J. Spahn | Boring implement | |
| 973,489 | Oct. 25, 1910 | F.E. Farley | Drill | drilling and boring |
| 1,230,020 | Jun. 12, 1917 | H.A. Pedrick | Boring Head | boring heads |
| 1,256,471 | Feb. 12, 1918 | T. Genero | Wear Compensating Feed Screw for Drills | |
| 2,709,267 | May 31, 1955 | J.R. Bashor, A.P. Speckin | Precision tapping spindle | tapping heads and chucks |
| 2,770,821 | Nov. 20, 1956 | W.J. Adlaf | Lead Screw Tapping Attachment Having Torque Responsive Feed Nut | tapping heads and chucks |
