| All Patents in class 91/285 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 72,714 | Dec. 31, 1867 | W. Ball | Steam Engine | steam engines |
| 384,336 | Jun. 12, 1888 | W. Ross, G. Ross | Water-engine valve | |
| 717,136 | Dec. 30, 1902 | E.E. Thomas | Engine | |
| 1,912,413 | Jun. 06, 1933 | E.J. Svenson | Milling machine | |
| 1,998,003 | Apr. 16, 1935 | L.F. Nenninger, C.W. Goodrich, H. Ernst | Hydraulic Feed Control | hydraulic apparatus |
| 2,091,425 | Aug. 31, 1937 | W.H. Wood | Hydraulically operated machine tool | surface grinders |
| 2,108,354 | Feb. 15, 1938 | F.A. Swanson | Blind end cylinder honing machine | |
