| All Patents in class 33/382 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
 | 8,897 | Apr. 20, 1852 | F. Wilbar | Improved Reflecting Spirit Level and Square |
 | 312,266 | Feb. 17, 1885 | W. Gurley | Rod-Plumbing Level |
 | 613,946 | Nov. 08, 1898 | L.S. Starrett | Combined Level, Square, and Plumb |
| | 903,011 | Nov. 03, 1908 | F. Schtabe | Level |
 | 960,718 | Jun. 07, 1910 | F. Schtabe | Level Attachment for Drills |
 | 1,210,339 | Dec. 26, 1916 | T.R. Maddox | Joint Gauge, Level and Miter Square |
 | 1,210,370 | Dec. 26, 1916 | J. Dvorak | Combined Level and Square |
 | 1,403,606 | Jan. 17, 1922 | C.L. Klapproth | Level |
 | 1,418,544 | Jun. 06, 1922 | J.F. Dodge | Mechanic's Level |
 | 1,511,464 | Oct. 14, 1924 | A.M. Guillet | Adjustable Level for Spinning Frames |
