| 词条 | William Howard (engineer) |
| 释义 |
William Howard (1793–1834) was an American mechanical engineer who was one of the first to work for the Baltimore and Ohio Railroad. When the railroad built its first cars using friction bearings first developed by Ross Winans, Howard made his own design and patented it on November 2, 1828. References
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3 : 1793 births|1834 deaths|Locomotive builders and designers |
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