| All Patents in class 33/496 |
Patents 1 -
12
of 12
      |
| Number | Date | Patentee | Title | Type |
| 245,874 | Aug. 16, 1881 | T.J. Sayre | Sliding Gage for Joint-Rules | |
| 415,944 | Nov. 26, 1889 | C. Gerhardt, H. Horn | Combined Rule and Protractor | rules |
| 715,194 | Dec. 02, 1902 | P.M. Callahan | Combined Rule and Square | folding rule joints |
| 718,300 | Jan. 13, 1903 | M.G. Bailey | Rule Attachment | rule attachments |
| 914,635 | Mar. 09, 1909 | J.B. McDonald, J.N. Bryant | Lumber Rule | lumber rules |
| 981,598 | Jan. 10, 1911 | A.W. Sandelin | Combined Rule and Protractor | |
| 999,725 | Aug. 08, 1911 | H.J. Adams, W.S. Adams | Combined Protractor and Rule | |
| 1,264,531 | Apr. 30, 1918 | H.H. Lambert | Combination Rule | |
| 1,286,525 | Dec. 03, 1918 | F. Buck | Joint for Folding Rulers | folding rule joints |
| 1,551,501 | Aug. 25, 1925 | W.L. Hurlburt | Rule Center Hinge | folding rule joints |
| 1,655,887 | Jan. 10, 1928 | C.J. Bailey | Protractor (folding rule, gear in center hinge) | |
| 1,847,757 | Mar. 01, 1932 | H.M. Gasstrom | Folding Rule Hinge | folding rule joints |
