| All Patents in class 235/70R |
Patents 1 -
10
of 16
      |
| Picture | Number | Date | Patentee | Title |
 | 2,907 | Jan. 10, 1843 | J.P. Smith | Merchant's Slide Rule |
 | 42,776 | May 17, 1864 | A. Jillson | Improvement in Sliding Scales for Steam Engines |
 | 71,979 | Dec. 10, 1867 | T. Carter | Improvement in Sawyers' Rules |
 | 450,141 | Apr. 14, 1891 | J.A. Cook | Telescopic Rule |
| | 450,640 | Apr. 21, 1891 | R.C. Smith | Slide Rule for Logarithmic Calculations |
 | 571,366 | Nov. 17, 1896 | R. Hegarty | Measuring Pole |
 | 613,684 | Nov. 08, 1898 | H. Kienast | Measuring Device |
 | 648,576 | May 01, 1900 | W.B. Taylor | Extensible Measuring Rule |
 | 651,142 | Jun. 05, 1900 | W.L. Keuffel | Slide Rule |
| | 844,536 | Feb. 19, 1907 | H.U. Prindle | Extensible Rule and Calipers |
