| All Patents in class 91/178 |
Patents 1 -
10
of 12
      |
| Picture | Number | Date | Patentee | Title |
| | 21,789 | Oct. 12, 1858 | W. Wells | Reciprocating Steam Engine |
| | 335,884 | Feb. 09, 1886 | G.W. Bigelow | Direct Acting Engine |
| | 336,743 | Feb. 23, 1886 | F. Plumb | Twin Cylinder Single Acting Engine |
 | 356,419 | Jan. 18, 1887 | F.W. Ofeldt | Gas Engine |
| | 414,045 | Oct. 29, 1889 | E. Huber | Steam Engine |
| | 447,671 | Mar. 03, 1891 | J.H. Eickershoff | Compound Steam Engine |
 | 481,773 | Aug. 30, 1892 | G.S. Strong | Four-cylinder engine |
| | 782,814 | Feb. 21, 1905 | F.H. Ball | Steam Engine |
| | 2,170,503 | Aug. 22, 1939 | H. Ernst, M.E. Martellotti | Milling Machine |
| | 2,430,394 | Nov. 04, 1947 | R.H. Shepard, B.E. Folke | Hydraulic Pump |
