| All Patents in class 33/388 |
Patents 1 -
10
of 59
      |
| Picture | Number | Date | Patentee | Title |
 | 4,611 | Jul. 02, 1846 | A. Girard | Plumb-Level |
 | 11,596 | Aug. 29, 1854 | L. Brooks | Inclinometer |
 | 12,384 | Feb. 13, 1855 | H.W. Evans | Spirit Level |
 | 20,943 | Jul. 20, 1858 | W.O. Fritschler | Carpenter's Rule |
 | 38,252 | Apr. 21, 1863 | F.A. Traut | Improvement in Combined Plumb and Levels |
 | 44,225 | Sep. 13, 1864 | H.S. Shepardson | Improvement in Spirit-Levels |
 | 49,710 | Sep. 05, 1865 | R.T. Burnett | Replacable Level Vials |
| | 56,013 | Jul. 03, 1866 | W.W. Cooper | Goniometer |
 | 65,726 | Jun. 11, 1867 | P. Clifford | Improvement in combined level and plumb |
 | 68,961 | Sep. 17, 1867 | L.L. Davis | Improvement in Adjustable Spirit Levels |
