| All Patents in class 33/382 |
Patents 1 -
13
of 13
      |
| Number | Date | Patentee | Title | Type |
| 8,897 | Apr. 20, 1852 | F. Wilbar | Improved Reflecting Spirit Level and Square | levels |
| 312,266 | Feb. 17, 1885 | W. Gurley | Rod-Plumbing Level | levels |
| 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 | levels |
| 1,210,339 | Dec. 26, 1916 | T.R. Maddox | Joint Gauge, Level and Miter Square | levels |
| 1,210,370 | Dec. 26, 1916 | J. Dvorak | Combined Level and Square | levels |
| 1,403,606 | Jan. 17, 1922 | C.L. Klapproth | Level | levels |
| 1,418,544 | Jun. 06, 1922 | J.F. Dodge | Mechanic's Level | metallic levels |
| 1,511,464 | Oct. 14, 1924 | A.M. Guillet | Adjustable Level for Spinning Frames | levels |
| 1,541,616 | Jun. 09, 1925 | B.C. Boggs | Bricklayer's Gauge | special purpose gauges |
| 2,627,665 | Feb. 10, 1953 | J.J. Strnad | Leveling gauge | gasket surface maintenance |
| 2,761,217 | Sep. 04, 1956 | H. King | Machine Alignment Detector | measuring tools |
