| All Patents of Type: extensible rules |
Patents 1 -
10
of 10
      |
| Number | Date | Patentee | Title | Type |
| 844,536 | Feb. 19, 1907 | H.U. Prindle | Extensible Rule and Calipers | extensible rules |
| 909,068 | Jan. 05, 1909 | W.H. Murphy, C.K. Denman | Extension Rule | extensible rules |
| 978,446 | Dec. 13, 1910 | H. Gasstrom | Rule | extensible rules |
| 1,050,733 | Jan. 14, 1913 | F.C. Greathead | Telescoping Pocket Rule | extensible rules |
| 1,068,887 | Jul. 29, 1913 | H. Gasstrom | Rule | extensible rules |
| 1,081,995 | Dec. 23, 1913 | L. Voggenreiter | Rule | folding rules |
| 1,299,627 | Apr. 08, 1919 | H. Simon | Rule | folding rules |
| 1,338,176 | Apr. 27, 1920 | G.L. Finstrom | Extensible Rule | extensible rules |
| 1,343,227 | Jun. 15, 1920 | H.J. Ostdiek | Caliper Rule | indicating calipers |
| 1,488,482 | Apr. 01, 1924 | J.Y. Eckman | Extensible Rule | extensible rules |
