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| Patents for William D. Clark | |||||
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| Number | Date | Patentee | Title | Type | |
| 501,598 | Jul. 18, 1893 | W.M. Byrd | Rotary Steam Engine | rotary steam engines | |
| 517,790 | Apr. 03, 1894 | W.M. Byrd | Rotary Steam Engine | rotary steam engines | |
| 1,657,025 | Jan. 24, 1928 | W.M. Byrd | Engine Governor | steam engine governors | |