| All Patents in class 74/841 |
Patents 16 -
30
of 71
      |
| Number | Date | Patentee | Title | Type |
| 108,310 | Oct. 11, 1870 | J. Wheelock | Improvement in Boring Apparatus | portable metal boring and drilling machines |
| 113,815 | Apr. 18, 1871 | G.C. Taft | Improvement in drilling-machines | horizontal drilling machines |
| 117,896 | Aug. 08, 1871 | J. Lemman | Improvement in drilling-machines | drill presses |
| 127,132 | May 21, 1872 | E.J. Worcester, A.F. Prentice | Improvement in drilling-machines | drill presses |
| 135,613 | Feb. 04, 1873 | E.J. Worcester | Improvement in drilling-machines | drill presses |
| 144,583 | Nov. 11, 1873 | J. Wheelock | Improvement in Tool-Holders and Cutter-Heads for Boring-Bars | portable metal boring and drilling machines |
| 148,691 | Mar. 17, 1874 | W. Gleason | Metal Drilling Machines | drill presses |
| 174,014 | Feb. 22, 1876 | C. Sellers | Feed-Motion for Drilling and Boring Machines | drilling and boring |
| 175,969 | Apr. 11, 1876 | D. Goodnow, Jr. | Improvement in hand-drills for drilling metal | hand drills |
| 195,085 | Sep. 11, 1877 | H.D. Brigham | Improvement in bench-drills | drill presses |
| 195,692 | Oct. 02, 1877 | W. Aldrich | Hand-Drills | drill presses |
| 195,993 | Oct. 09, 1877 | M.L. Edwards | Metal Drilling Machine | drill presses |
| 216,381 | Jun. 10, 1879 | C.W. Coe | Improvement in drilling-machines | drill presses |
| 257,532 | May 09, 1882 | G.C. Taft | Drilling-machine | woodworking post drills |
| 259,147 | Jun. 06, 1882 | F.L. Heughes | Hand drilling-machine | drill presses |
