| All Patents in class 417/298 |
Patents 1 -
8
of 8
      |
| Picture | Number | Date | Patentee | Title |
 | 770,785 | Sep. 27, 1904 | E.H. Steedman | Pressure control for air-compressors |
 | 1,159,123 | Nov. 02, 1915 | G.F. Steedman | Compressor |
| | 1,275,426 | Aug. 13, 1918 | F.G. Hobart | Oil Engine Feeding Device |
 | 1,396,391 | Nov. 08, 1921 | F. Ackerman, C.W. Frees | Power-operated compressor |
| | 1,446,511 | Feb. 27, 1923 | H.C. Little | Pump Unloader |
| | 1,769,898 | Jul. 01, 1930 | W.E. Mathews | Unloading System for Compressors |
| | 1,989,891 | Feb. 05, 1935 | C.G. Sprado | Fuel Injection Device |
| | 3,578,890 | May 18, 1971 | O.F. Jensen | Rotary Steam Engine |
