All Patents of Type: levels |
Patents 1 -
15
of 382
|
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 |
956 | Oct. 03, 1838 | L. Lewis | Balance and Pendulum Level and Plumb | pendulum levels |
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 |
7,263 | Apr. 09, 1850 | W.G. Ladd, Jr. | Fluid Level | inclinometers |
7,477 | Jul. 02, 1850 | J. Locke | Collimating Level | levels |
NS-14 | Jul. 12, 1851 | A. Chisholm | Improved spirit level | spirit levels |
8,897 | Apr. 20, 1852 | F. Wilbar | Improved Reflecting Spirit Level and Square | levels |
9,722 | May 17, 1853 | T.A. Chandler | Pendulum Level | inclinometers |
9,867 | Jul. 19, 1853 | S.J. Sherman | Pocket Level | levels |
11,596 | Aug. 29, 1854 | L. Brooks | Inclinometer | inclinometers |
11,841 | Oct. 24, 1854 | J. Shanklin | Square, Scale, Level, and Bevel | squares |
12,384 | Feb. 13, 1855 | H.W. Evans | Spirit Level | inclinometers |