| All Patents in class 33/390 |
Patents 1 -
10
of 15
      |
| Picture | Number | Date | Patentee | Title |
 | 544,587 | Aug. 13, 1895 | W. Moore | Plumb and Level |
 | 666,843 | Jan. 29, 1901 | F.A. Brownell | Spirit Level |
 | 811,175 | Jan. 30, 1906 | J.T. Rider | Level |
 | 949,842 | Feb. 22, 1910 | H.H. Pugh | Level Device for Braces, &c. |
| | 970,360 | Sep. 13, 1910 | W.H. Whigham | Angle guide attachment for boring-tools |
 | 1,409,537 | Mar. 14, 1922 | H.M. Franzen | Universal Level |
 | 1,418,544 | Jun. 06, 1922 | J.F. Dodge | Mechanic's Level |
 | 1,422,231 | Jul. 11, 1922 | J. Stanley | Combined Level, Plumb, Square, and Measure |
 | 1,576,260 | Mar. 09, 1926 | H.F. Waite | Dental Level |
| | 2,206,003 | Jun. 25, 1940 | E.B. Donnell | Inclinometer |
