| Patents for Donald C. Ridout |
Patents 1 -
6
of 6
      |
| Number | Date | Patentee | Title | Type |
| 109,121 | Nov. 08, 1870 | J. Findlay | Improvement in Vises | hand vises |
| CA-830 | Mar. 08, 1871 | J. Findlay | Improvements on adjustable tool stock for lathes | metal lathe accessories and attachments |
| CA-877 | Mar. 16, 1871 | R. Walker | Improvements on drilling and boring machines | drill presses |
| 209,771 | Nov. 12, 1878 | J. Nesbitt, A. Anderson | Improvements in curtain-rollers | |
| 221,950 | Nov. 25, 1879 | G.S. Woodruff | Gas-governors | steam engine governors |
| 225,633 | Mar. 16, 1880 | J. Nesbitt | Electric railway-semaphore | track and switches |
