| All Patents in class 173/35 |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 249,130 | Nov. 01, 1881 | G.D. Whitcomb | Rotary mining-drill | miner |
| 282,632 | Aug. 07, 1883 | M. Hardsocg | Mining Machine | mining apparatus |
| 335,758 | Feb. 09, 1886 | A. John | Drilling Machine | mining apparatus |
| 396,018 | Jan. 08, 1889 | C.M. Woolworth | Drilling-machine | portable metal boring and drilling machines |
| 481,598 | Aug. 30, 1892 | W.X. Stevens | Rock-drilling machine | impact chisels and drills |
| 550,306 | Nov. 26, 1895 | W.T. Welch | Ratchet drill | |
| 1,273,733 | Jul. 23, 1918 | J.M. Calderwood | Drill Holder | |
| 1,278,084 | Sep. 10, 1918 | J.R. Abbott | Drill | |
