| All Patents in class 33/384 |
Patents 1 -
15
of 22
      |
| Number | Date | Patentee | Title | Type |
| 191,389 | May 29, 1877 | T. Bedworth, F.T. Ward | Improvement in Spirit Levels | metallic levels |
| 250,080 | Nov. 29, 1881 | F. Kraengel | Spirit Level | inclinometers |
| 312,743 | Feb. 24, 1885 | B.B. Merrill | Combined Square, Bevel and Level | squares |
| 423,969 | Mar. 25, 1890 | J.A. Traut | Spirit-Level | level adjustments |
| 467,016 | Jan. 12, 1892 | M.F. Oliver | Square for Leveling & Aligning Shafting | special purpose gauges |
| 523,021 | Jul. 17, 1894 | J.A. Traut | Level Vial Adjustment | levels |
| 565,098 | Aug. 04, 1896 | J.A. Traut | Level | levels |
| 618,254 | Jan. 24, 1899 | J. Morrison | Plumb rule and level | |
| 703,678 | Jul. 01, 1902 | J.A. Traut | Spirit-Level | levels |
| 742,010 | Oct. 20, 1903 | G.L. Davis | Spirit Level | metallic levels |
| 756,628 | Apr. 05, 1904 | J. Happle | Level, Plumb, and Inclinometer | inclinometers |
| 787,940 | Apr. 25, 1905 | A.J. Perks | Spirit level attachment for straight edges | |
| 813,561 | Feb. 27, 1906 | R. Leonhart | Level | levels |
| 826,182 | Jul. 17, 1906 | J. Morrison | Plumb rule and level | |
| 857,600 | Jun. 25, 1907 | W.U. Colthar | Paper-Hanger's Plumb Level | levels |
