| Patents for Dexter D. Hardy |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 24,388 | Jun. 14, 1859 | D.D. Hardy | Rotary Steam Engine | rotary steam engines |
| 77,373 | Apr. 28, 1868 | D.D. Hardy | Rotary Engine | rotary steam engines |
| 141,436 | Aug. 05, 1873 | D.D. Hardy | Rotary Steam-Engines | rotary steam engines |
| 163,486 | May 18, 1875 | F.D. Hardy | Improvement in Car Starters | |
| 313,728 | Mar. 10, 1885 | D.D. Hardy | Steam Engine | steam engines |
| 313,729 | Mar. 10, 1885 | D.D. Hardy | Steam Engine Valve | steam engine valves |
| 313,730 | Mar. 10, 1885 | D.D. Hardy | Multiple Cylinder Engine | steam engine cylinders |
| 434,561 | Aug. 19, 1890 | D.D. Hardy | Steam Engine | steam engines |
