| All Patents in class 33/386 |
Patents 1 -
10
of 17
      |
| Picture | Number | Date | Patentee | Title |
 | 60,788 | Jan. 01, 1867 | W.L. Richardson | Sighting Level |
 | 68,603 | Sep. 10, 1867 | A. Stanley, S.N. Chapin | Improvement in Adjusting Spirit Levels |
 | 73,670 | Jan. 21, 1868 | W.J. Tate | Improvement in Adjustable Spirit Levels |
 | 128,513 | Jul. 02, 1872 | J.A. Traut | Improvement in Spirit Levels |
 | 288,624 | Nov. 20, 1883 | L.L. Davis | Spirit Level and Plumb |
 | 353,846 | Dec. 07, 1886 | G. Cook | Spirit Level |
 | 421,786 | Feb. 18, 1890 | J.A. Traut | Spirit Level |
 | 423,094 | Mar. 11, 1890 | E.H. Taylor | Apparatus for Leveling and Marking Shafts |
 | 465,882 | Dec. 29, 1891 | C.E. Peterson | Spirit-Level |
 | 523,023 | Jul. 17, 1894 | J.A. Traut | Level |
