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| Patents for William O. Stark | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 410,199 | Sep. 03, 1889 | J. Ross | Automatic balancing device for swing-saws | |
 | 415,055 | Nov. 12, 1889 | F.C. Olin | Steam Pump | |
 | 426,511 | Apr. 29, 1890 | F.C. Olin | Steam Pump and Motor | |
 | 443,107 | Dec. 23, 1890 | F.C. Olin | Balanced Govenor Valve | |
 | 450,141 | Apr. 14, 1891 | J.A. Cook | Telescopic Rule | |