All Patents of Type: well drilling machines |
Patents 1 -
6
of 6
|
Number | Date | Patentee | Title | Type |
47,727 | May 16, 1865 | W.S. Hunter, S.R. Hunter | Boring Artesian Wells | well drilling machines |
367,783 | Aug. 09, 1887 | J.S. Brown | Well Drilling and Piping Machine | well drilling machines |
410,311 | Sep. 03, 1889 | M.T. Chapman | Expansion Drill | well drilling machines |
446,622 | Feb. 17, 1891 | F.A. Flanegin | Drill Jar | well drilling machines |
1,679,825 | Aug. 07, 1928 | R.J. Holmgreen, J.H. Holmgreen | Rotary Well Drilling Machine | well drilling machines |
1,756,799 | Apr. 29, 1930 | F.W. Sadler | Casing Cover and Tool Holder for Wells | tool holders |