| All Patents in class 33/350 |
Patents 1 -
10
of 16
      |
| Picture | Number | Date | Patentee | Title |
 | 100,463 | Mar. 01, 1870 | C.M. Stratton, E.A. Stratton | Improvement in Spirit Level |
 | 108,875 | Nov. 01, 1870 | H.L. Buckwalter | Improvements in Squares and Levels |
 | 191,389 | May 29, 1877 | T. Bedworth, F.T. Ward | Improvement in Spirit Levels |
 | 250,080 | Nov. 29, 1881 | F. Kraengel | Spirit Level |
 | 266,671 | Oct. 31, 1882 | W.L. Bergen | Plumb Bob |
 | 267,655 | Nov. 14, 1882 | W.C. Vajen | Plumb Bob |
 | 329,573 | Nov. 03, 1885 | A. Leidgen | Plumb Bob |
 | 370,826 | Oct. 04, 1887 | C.M. Stratton, E.A. Stratton | Spirit Level Stock |
 | 423,484 | Mar. 18, 1890 | W. Martin | Inclinometer |
 | 511,377 | Dec. 26, 1893 | J.A. Traut | Spirit-Level |
