| All Patents of Type: spirit levels |
Patents 1 -
15
of 19
      |
| Number | Date | Patentee | Title | Type |
| NS-14 | Jul. 12, 1851 | A. Chisholm | Improved spirit level | spirit levels |
| 84,880 | Dec. 15, 1868 | C.F. Hill | Spirit Level | spirit levels |
| 281,086 | Jul. 10, 1883 | S.H. Lemon | Spirit Level | spirit levels |
| 359,580 | Mar. 15, 1887 | W.C. Thatcher | Spirit Level | spirit levels |
| 360,536 | Apr. 05, 1887 | T.J. Megown | Leveling Instrument | spirit levels |
| 363,140 | May 17, 1887 | J. Holly | Spirit Level | spirit levels |
| 391,717 | Oct. 23, 1888 | C.H. Miller | Spirit Level and Inclinometer | spirit levels |
| 505,445 | Sep. 26, 1893 | W.R. Dorton | Adjustable Spirit Level and Plumb Device | spirit levels |
| 683,033 | Sep. 24, 1901 | E.E. Frederick | Spirit Level | spirit levels |
| 730,568 | Jun. 09, 1903 | W. Potter | Combination Carpenter's Level | spirit levels |
| 743,100 | Nov. 03, 1903 | W. Potter | Carpenter's Level and Quadrant | spirit levels |
| 756,949 | Apr. 12, 1904 | R.B. Ferguson | Spirit Level | spirit levels |
| 1,087,555 | Feb. 17, 1914 | J. Sand, J. Sand, Jr. | Level | spirit levels |
| 1,414,847 | May 02, 1922 | E. Wells | Tool | calipers |
| 2,211,201 | Aug. 13, 1940 | W.B. Fell | Machinist's precision level | spirit levels |
