| All Patents in class 91/330 |
Patents 1 -
15
of 15
      |
| Number | Date | Patentee | Title | Type |
| 144,788 | Nov. 18, 1873 | W. Hopkins, G.G. Picking | Steam-Cylinders and Piston-Valves | |
| 358,435 | Mar. 01, 1887 | G.E. Dow | Steam Engine | steam engines |
| 359,707 | Mar. 22, 1887 | W. Brown | Valve for Steam Engines | steam engine valves |
| 425,219 | Apr. 08, 1890 | N.T. Greene | Exhaust-valve-gear for engines | steam engine valve gear |
| 430,311 | Jun. 17, 1890 | J.W. Eisenhuth | Cut-Off for Compound Engines | steam engines |
| 433,200 | Jul. 29, 1890 | W.H. Millward, W. Foster | Steam Actuated Valve | steam engine valve gear |
| 541,785 | Jun. 25, 1895 | J.F. Doolittle | Steam Hammer | steam hammers |
| 693,939 | Feb. 25, 1902 | M.A. Yeakley | Pneumatic hammer | power hammers |
| 882,588 | Mar. 24, 1908 | W.T. Sears | Drop Hammer | drop hammers |
| 1,580,094 | Apr. 06, 1926 | A. White | Tool-operating machine | mortising machines |
| 1,912,413 | Jun. 06, 1933 | E.J. Svenson | Milling machine | |
| 2,164,875 | Jul. 04, 1939 | C. Herfurth | Grinding Machine | grinding machines |
| 2,630,788 | Mar. 10, 1953 | H.G. Mueller | Valve Operating Mechanism for Controlling the Steam Events in Steam Engines | steam engine valve gear |
| 2,656,681 | Oct. 27, 1953 | G.J. Peterson | Variable stroke power actuator | sanding machines |
| 2,671,292 | Mar. 09, 1954 | E.Y. Seborg, H.J. Caldwell | Control Mechanism for Honing Machines | machine tool controls |
