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| Patents for Harrisburg Foundry & Machine Works | |||||
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| Number | Date | Patentee | Title | Type | |
| 89,130 | Apr. 20, 1869 | D.C. Cumings | Improvement in vises | leg vises | |
| 133,054 | Nov. 12, 1872 | G.W. Reisinger | Improvement in piston-packing | piston ring and packing | |
| 367,912 | Aug. 09, 1887 | M.E. Hershey | Traction Engine | steam traction engines | |
| 479,273 | Jul. 19, 1892 | M.E. Hershey | Piston-valve | steam engine valves | |
| 603,189 | Apr. 26, 1898 | M.E. Hershey, B.T. Allen | Motor-governor | steam engine governors | |