| All Patents in class 33/458 |
Patents 31 -
45
of 50
      |
| Number | Date | Patentee | Title | Type |
| 871,996 | Nov. 26, 1907 | J. Haugland, J. Jacobson | Folding Level | wooden levels |
| 922,580 | May 25, 1909 | C. Hansen | Rule | folding rules |
| 941,492 | Nov. 30, 1909 | P.F. Burns | Combination Rule, Square and Protractor | rules |
| 942,583 | Dec. 07, 1909 | W.L. Neeld | Rule | folding rules |
| 1,004,173 | Sep. 26, 1911 | J. Kline, J. Joss | Combination Rule, Bevel and Marking Gage | bevel squares |
| 1,068,887 | Jul. 29, 1913 | H. Gasstrom | Rule | extensible rules |
| 1,088,544 | Feb. 24, 1914 | L.D. Craig | Combined Folding Rule and Square | folding rules |
| 1,120,443 | Dec. 08, 1914 | F. Buck | Level Rule | levels |
| 1,262,038 | Apr. 09, 1918 | H.M. Gould | Combined Rule and Case | rule accessories |
| 1,432,834 | Oct. 24, 1922 | F. Buck | Folding Rule | rules |
| 1,438,234 | Dec. 12, 1922 | D. Gould, W.H. Hart | Joint for Zig-Zag Folding Rules | folding rule joints |
| 1,438,236 | Dec. 12, 1922 | D. Gould, W.H. Hart | Joint for Zig-Zag Folding Rules | folding rule joints |
| 1,460,784 | Jul. 03, 1923 | F. Buck | Folding Rule | folding rules |
| 1,488,482 | Apr. 01, 1924 | J.Y. Eckman | Extensible Rule | extensible rules |
| 1,488,916 | Apr. 01, 1924 | A. George | Folding Square and Protractor | combination tools |
