| All Patents of Type: level adjustments |
Patents 1 -
15
of 19
      |
| Number | Date | Patentee | Title | Type |
| 12,384 | Feb. 13, 1855 | H.W. Evans | Spirit Level | inclinometers |
| 17,870 | Jul. 28, 1857 | C. Cole | Adjustment Applied to Pendulum Levels | level adjustments |
| 18,728 | Dec. 01, 1857 | C. Becker | Surveying Level | level adjustments |
| 36,906 | Nov. 11, 1862 | T.N. Hosmer | Improvement in Spirit-Levels | level adjustments |
| 49,710 | Sep. 05, 1865 | R.T. Burnett | Replacable Level Vials | level adjustments |
| 52,579 | Feb. 13, 1866 | R. Ledig | Improvement in Spirit-Levels | inclinometers |
| 423,969 | Mar. 25, 1890 | J.A. Traut | Spirit-Level | level adjustments |
| 573,682 | Dec. 22, 1896 | W.M. Morton | Spirit-Level and Plumb | level adjustments |
| 785,581 | Mar. 21, 1905 | A.V. Shorts | Level | level adjustments |
| 820,028 | May 08, 1906 | J.A. Traut | Level | level adjustments |
| 857,991 | Jun. 25, 1907 | W.A. Gibson | Combined Level and Plumb | inclinometers |
| 902,778 | Nov. 03, 1908 | J.A. Traut | Plumb-Level | level adjustments |
| 948,232 | Feb. 01, 1910 | O.H. Lund | Level Attachment for Straight-Edges | level adjustments |
| 1,007,303 | Oct. 31, 1911 | F.W. Merriman | Level | level adjustments |
| 1,211,882 | Jan. 09, 1917 | E.A. Schade | Spirit-Level | metallic levels |
