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| Patents for Daniel S. Regan | |||||
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| Picture | Number | Date | Patentee | Title | |
 | 320,285 | Jun. 16, 1885 | D.S. Regan | Electric Igniter Device for Gas Engines | |
 | 333,336 | Dec. 29, 1885 | D.S. Regan | Gas Engine | |
| 397,753 | Feb. 12, 1889 | D.S. Regan | Governor for Gas Engines | ||
 | 408,356 | Aug. 06, 1889 | D.S. Regan | Gas Engine | |
| 448,369 | Mar. 17, 1891 | D.S. Regan | Vapor Engine | ||