| All Patents in class 33/379 |
Patents 1 -
10
of 21
      |
| Picture | Number | Date | Patentee | Title |
 | 100,463 | Mar. 01, 1870 | C.M. Stratton, E.A. Stratton | Improvement in Spirit Level |
 | 129,183 | Jul. 16, 1872 | E.A. Stratton, C.M. Stratton | Improvement in adjustable spirit-levels |
 | 198,909 | Jan. 01, 1878 | T. Bedworth, F.T. Ward | Improvement in Spirit Levels |
 | 310,154 | Dec. 30, 1884 | B.F. Tyler | Spirit Level |
 | 339,369 | Apr. 06, 1886 | G. Blythe | Spirit Level |
 | 356,645 | Jan. 25, 1887 | H.N. Jasper | Akron Spirit Level |
 | 365,033 | Jun. 14, 1887 | O.D. Wood | Spirit Level |
 | 383,196 | May 22, 1888 | C.M. Stratton, E.A. Stratton | Spirit Level |
 | 397,043 | Jan. 29, 1889 | R.D. Werden | Spirit Level |
 | 511,377 | Dec. 26, 1893 | J.A. Traut | Spirit-Level |
