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| Patents for L. W. Howard | |||||
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| Number | Date | Patentee | Title | Type | |
| 326,497 | Sep. 15, 1885 | L. Gray, A.Y. Gray | Governor | ||
| 434,266 | Aug. 12, 1890 | L. Gray, A.Y. Gray | Brake for horse-powers or speed-regulators | animal powered apparatus | |