| All Patents in class 235/84 |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 540,184 | May 28, 1895 | T. Norris | Markre for Slide Rules | cursors |
| 845,463 | Feb. 26, 1907 | H.T. Hincks | Slide Rule | circular slide rules |
| 2,277,643 | Mar. 24, 1942 | M.P. Holmes | Speed Controlling Mechanism | turret lathes |
| 2,289,110 | Jul. 07, 1942 | R.D. Wortendyke, H. Ernst | Milling Speed Calculator | speed and feed calculators |
| 2,331,967 | Oct. 19, 1943 | R.D. Wortendyke, H. Ernst | Calculating Device | |
| 2,492,229 | Dec. 27, 1949 | H.C. Kemper, R.K. Le Blond | Indicating Dial | machine tool controls |
