| All Patents in class 33/451 |
Patents 1 -
15
of 45
      |
| Number | Date | Patentee | Title | Type |
| 35,298 | May 20, 1862 | A. Cahoon, Jr. | Improvement in Combined Spirit-Levels | inclinometers |
| 66,695 | Jul. 16, 1867 | A.W. Elmer, C. Ensminger | Plumb Level | inclinometers |
| 120,675 | Nov. 07, 1871 | G.A. Shelley | Improvement in Spirit Levels | levels |
| 142,761 | Sep. 16, 1873 | S.H. Bellows | Machinists' Gages | special purpose gauges |
| 160,503 | Mar. 09, 1875 | W. Ascough | Combined Bevel, Try-Square, and Divider | bevels |
| 312,548 | Feb. 17, 1885 | J.W. Atkinson | L-Shaped Level | levels |
| 324,323 | Aug. 11, 1885 | L.D. Howard | Combined try-square and bevel | bevel squares |
| 329,156 | Oct. 27, 1885 | W. Ford | Combination Square and Gage | bevel squares |
| 339,158 | Apr. 06, 1886 | J.A. Finley | Combined square, level, and bevel | bevel squares |
| 339,287 | Apr. 06, 1886 | C. Gates | Combined plumb, level, and square | levels |
| 345,196 | Jul. 06, 1886 | A.S. Vose | Try and Bevel Square | bevel squares |
| 347,016 | Aug. 10, 1886 | C. Tepel | Calipers for Inside and Outside Measurement | calipers |
| 363,988 | May 31, 1887 | J. Carson | Combined Square, Miter-Bevel and Level | bevels |
| 387,570 | Aug. 07, 1888 | J.A. Traut | Pocket Rule | folding rule joints |
| 419,615 | Jan. 14, 1890 | C. Stilwell | Adjustable Bevel Square | bevel squares |
