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| Patents for J. W. Hamilton Johnson | |||||
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| Number | Date | Patentee | Title | Type | |
| 341,935 | May 18, 1886 | L.H. Nash | Method of Operating Gas Engines | gas and gasoline engines | |
| 386,211 | Jul. 17, 1888 | L.H. Nash | Gas Engine | gas and gasoline engines | |
| 386,216 | Jul. 17, 1888 | L.H. Nash | Ignitor and Supply Valve for Gas Engines | ignition systems | |