| All Patents in class 403/101 |
Patents 1 -
10
of 13
      |
| Picture | Number | Date | Patentee | Title |
 | 336,409 | Feb. 16, 1886 | C. Head | Transfer Bevel |
 | 669,766 | Mar. 12, 1901 | C.E. Ricker | Rule Joint |
 | 734,013 | Jul. 21, 1903 | F.L. Traut, J.A. Traut | Foldable Rule |
 | 765,598 | Jul. 19, 1904 | B. Schlag | Extension Rule |
 | 827,480 | Jul. 31, 1906 | J.A. Traut | Extension Rule |
| | 909,819 | Jan. 12, 1909 | T. Prentice | Rule Joint |
 | 1,069,186 | Aug. 05, 1913 | F.X. Rudler | Rustless Rule |
 | 1,438,234 | Dec. 12, 1922 | D. Gould, W.H. Hart | Joint for Zig-Zag Folding Rules |
 | 1,438,235 | Dec. 12, 1922 | D. Gould, W.H. Hart | Joint for Zig-Zag Folding Rules |
 | 1,438,236 | Dec. 12, 1922 | D. Gould, W.H. Hart | Joint for Zig-Zag Folding Rules |
