| All Patents of Type: levels |
Patents 1 -
15
of 182
      |
| Number | Date | Patentee | Title | Type |
| 6,726X | Aug. 25, 1831 | J.E. Eldred | Level and plumb instrument | levels |
| 8,631X | Feb. 11, 1835 | J. Eames | Surveyor's Theodolite | surveyor |
| 1,403 | Nov. 09, 1839 | R. Fish | Apparatus for grading streets and roads | levels |
| 4,611 | Jul. 02, 1846 | A. Girard | Plumb-Level | levels |
| 6,097 | Feb. 06, 1849 | S.A. Abbott, E. Elicott | Level-scale for canals, railroads, &c. | levels |
| 7,477 | Jul. 02, 1850 | J. Locke | Collimating Level | levels |
| 8,897 | Apr. 20, 1852 | F. Wilbar | Improved Reflecting Spirit Level and Square | levels |
| 9,867 | Jul. 19, 1853 | S.J. Sherman | Pocket Level | levels |
| 11,841 | Oct. 24, 1854 | J. Shanklin | Square, Scale, Level, and Bevel | squares |
| RE374 | Jul. 01, 1856 | S.J. Sherman | Pocket Level | levels |
| 20,337 | May 25, 1858 | T.L. Morse (Morss), H. Disston | Leveling Device Attached to Handsaws | combination saws |
| XC-853 | Jul. 13, 1858 | A.N. Cole | Instrument, called Cole's Gravitating Plumb and Level | levels |
| 25,446 | Sep. 13, 1859 | T.S. Scoville | Spirit-Level | levels |
| 26,762 | Jan. 10, 1860 | S.D. Hailey | Surveyor's Level | levels |
| 26,956 | Jan. 24, 1860 | J. Steger | Pocket-Level | levels |
