| All Patents in class 74/519 |
Patents 1 -
9
of 9
      |
| Picture | Number | Date | Patentee | Title |
| | 96,636 | Nov. 09, 1869 | G.N. Tibbles | Traction Engine |
 | 151,364 | May 26, 1874 | J.W. Douglas | Improvement in the construction of pump-gearing |
| | 215,808 | May 27, 1879 | G.H. Corliss | Beam for Steam Engines |
| | 989,708 | Apr. 18, 1911 | L.G. Neely, C.L. Heisler | Swing Frame for Pumping Oil Wells |
| | 1,258,952 | Mar. 12, 1918 | J.M. Short | Drilling Machine |
 | 1,835,842 | Dec. 08, 1931 | G.H. Benzon, Jr. | Feed Mechanism |
 | 2,005,696 | Jun. 18, 1935 | G. Horner, P.M. Henkes, G. Gorton | Machine Tool |
| | 2,337,513 | Dec. 21, 1943 | O.H. Watson | Composite Lever for Weighing Scales |
| | 2,631,576 | Mar. 17, 1953 | C.H. Schowalter | Valve Operating Mechanism |
