| All Patents in class 33/451 |
Patents 1 -
10
of 45
      |
| Picture | Number | Date | Patentee | Title |
 | 35,298 | May 20, 1862 | A. Cahoon, Jr. | Improvement in Combined Spirit-Levels |
 | 66,695 | Jul. 16, 1867 | A.W. Elmer, C. Ensminger | Plumb Level |
 | 120,675 | Nov. 07, 1871 | G.A. Shelley | Improvement in Spirit Levels |
 | 142,761 | Sep. 16, 1873 | S.H. Bellows | Machinists' Gages |
 | 160,503 | Mar. 09, 1875 | W. Ascough | Combined Bevel, Try-Square, and Divider |
 | 312,548 | Feb. 17, 1885 | J.W. Atkinson | L-Shaped Level |
 | 324,323 | Aug. 11, 1885 | L.D. Howard | Combined try-square and bevel |
 | 329,156 | Oct. 27, 1885 | W. Ford | Combination Square and Gage |
 | 339,158 | Apr. 06, 1886 | J.A. Finley | Combined square, level, and bevel |
 | 339,287 | Apr. 06, 1886 | C. Gates | Combined plumb, level, and square |
