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| Patents for Ephraim Howland | |||||
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| Number | Date | Patentee | Title | Type | |
| 443,481 | Dec. 23, 1890 | E. Howland | Portable Steam Engine | portable steam engines | |
| 453,368 | Jun. 02, 1891 | E. Howland | Steam Steering Gear for Vehicles | traction engine steering apparatus | |
| 453,369 | Jun. 02, 1891 | E. Howland | Steering Gear for Vehicles | traction engine steering apparatus | |