| All Patents in class 91/233 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 106,078 | Aug. 02, 1870 | J. Robertson | Direct Acting Engine | gas and gasoline engines |
| 113,725 | Apr. 18, 1871 | W. Baxter, Jr. | Steam Pump | steam pumps |
| 138,622 | May 06, 1873 | R. Eickemeyer | Improvement in steam-pumps | steam pumps |
| 155,933 | Oct. 13, 1874 | R. Eickemeyer | Improvement in steam-engines | steam engines |
| 315,516 | Apr. 14, 1885 | W.J. Lane | Steam Engine | steam engines |
| 617,529 | Jan. 10, 1899 | A. Howard | Motive Engine | steam engines |
| 2,345,563 | Apr. 04, 1944 | R.L. Alcorn, Jr. | Hydraulically operated drop hammer | drop hammers |
