| All Patents in class 91/234 |
Patents 1 -
10
of 10
      |
| Picture | Number | Date | Patentee | Title |
 | 46,470 | Feb. 21, 1865 | W.C. Hicks | Improvement in steam-engines |
 | 80,550 | Aug. 04, 1868 | D. Joy | Steam Hammer |
| | 355,037 | Dec. 28, 1886 | E.C. Terry | Piston Water Meter |
| | 407,184 | Jul. 16, 1889 | J.H. Eickershoff | Single Acting Compound Engine |
| | 441,947 | Dec. 02, 1890 | J.H. Eickershoff | Compound Engine |
| | 514,169 | Feb. 06, 1894 | N. Tesla | Reciprocating engine |
| | 517,900 | Apr. 10, 1894 | N. Tesla | Steam-Engine |
| | 518,032 | Apr. 10, 1894 | W.E. Gibbs | Percussion Tool |
 | 2,260,624 | Oct. 28, 1941 | A.S. Johann | Sheet Metal Shaper |
| | 2,561,577 | Jul. 24, 1951 | R.G. Knudsen | Pneumatic Impact Pullers and the Like |
