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| Patents for Horace Mack | |||||
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| Number | Date | Patentee | Title | Type | |
| 414,460 | Nov. 05, 1889 | R.H. Thurston | Steam-engine | steam engines | |
| 504,953 | Sep. 12, 1893 | R.H. Thurston | Engine-governor | steam engine governors | |