| Patents for John F. Allen |
Patents 1 -
10
of 17
      |
| Picture | Number | Date | Patentee | Title |
 | 14,991 | May 27, 1856 | J.F. Allen | Operating slide-valves for steam-engines |
 | 16,781 | Mar. 10, 1857 | J.F. Allen | Improvement in cut-offs for steam-engines |
 | 20,768 | Jun. 29, 1858 | J.F. Allen | Valve-gearing for steam-engines |
 | 35,068 | Apr. 29, 1862 | J.F. Allen | Steam-engine |
 | 35,069 | Apr. 29, 1862 | J.F. Allen | Improvement in slide-valves for steam-engines |
 | 35,070 | Apr. 29, 1862 | J.F. Allen | Improved link-motion for steam-engines |
 | 35,071 | Apr. 29, 1862 | J.F. Allen | Improved valve-gear for steam-engines |
| | 36,695 | Oct. 21, 1862 | J.F. Allen | Improvement in valve-gears of steam-engines |
 | 52,810 | Feb. 27, 1866 | J.F. Allen | Improved apparatus for punching |
 | 72,582 | Dec. 24, 1867 | J.F. Allen | Handsaw |
