| Patents for Jason F. Williamson |
Patents 1 -
8
of 8
      |
| Number | Date | Patentee | Title | Type |
| 407,806 | Jul. 30, 1889 | J. Peebles, E.J. Woolf | Valve Gear for Engines | steam engine valve gear |
| 444,563 | Jan. 13, 1891 | E.J. Woolf | Valve-Gear for Engines | steam engine valve gear |
| 455,872 | Jul. 14, 1891 | J. Peebles, E.J. Woolf | Valve Gear for Engines | steam engine valve gear |
| 475,427 | May 24, 1892 | E.J. Woolf | Single Cylinder Compound Engine | steam engines |
| 521,278 | Jun. 12, 1894 | E.J. Woolf | Engine | steam engine valve gear |
| 531,285 | Dec. 18, 1894 | E.J. Woolf | Engine | steam engine valve gear |
| 627,219 | Jun. 20, 1899 | E.J. Woolf | Air and Gas Engine | gas and gasoline engines |
| 627,220 | Jun. 20, 1899 | E.J. Woolf | Air and Gas Engine | gas and gasoline engines |
