| All Patents in class 91/448 |
Patents 1 -
15
of 24
      |
| Number | Date | Patentee | Title | Type |
| 52,789 | Feb. 20, 1866 | A. Lawrence | Governor | steam engine governors |
| RE8,937 | Oct. 21, 1879 | A. Lawrence | Steam-Engine Governor | steam engine governors |
| 495,282 | Apr. 11, 1893 | C. Vogel | Valve for Steam Engines | steam engine valves |
| 519,639 | May 08, 1894 | E.S. Matthews | Hydraulic valve | |
| 640,504 | Jan. 02, 1900 | E.E. Thomas | Steam log-turner | sawmill log handling |
| 693,939 | Feb. 25, 1902 | M.A. Yeakley | Pneumatic hammer | power hammers |
| 816,285 | Mar. 27, 1906 | I. Abbott | Rotary Engine | rotary steam engines |
| 989,009 | Apr. 11, 1911 | C.L. Heisler | Cylinder Drain Cock Operating Mechanism | locomotive drain cock apparatus |
| 1,234,882 | Jul. 31, 1917 | W.A. Doble | Speed Governor | water wheel governors |
| 1,283,738 | Nov. 05, 1918 | R. Green | Sawing Machine | sawmill carriages |
| 1,429,421 | Sep. 19, 1922 | E.J. Fritsch, R.W. Nazel | Fluid-power hammer | drop hammers |
| 1,722,506 | Jul. 30, 1929 | H.G. Sahlin | Drop hammer | drop hammers |
| 1,931,452 | Oct. 17, 1933 | L.G. Wheeler | Hydraulic machine tool feed | multiple spindle drill presses |
| 2,006,312 | Jun. 25, 1935 | B. Sassen, H. Ernst | Compensating Bleeder Valve | hydraulic apparatus |
| 2,046,447 | Jul. 07, 1936 | E.C. Clarke | Steam hammer | drop hammers |
