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| Patents for Hinsdale Smith | |||||
| Picture | Number | Date | Patentee | Title | |
| 624,555 | May 09, 1899 | H. Smith | Explosive Engine | ||
| 626,444 | Jun. 06, 1899 | H. Smith | Variable Speed Gearing | ||
| 626,445 | Jun. 06, 1899 | H. Smith | Variable Speed Gearing | ||
| 632,762 | Sep. 12, 1899 | H. Smith | Gas Engine | ||
| 632,763 | Sep. 12, 1899 | H. Smith | Explosive Gas Engine | ||
| 657,576 | Sep. 11, 1900 | H. Smith | Gas Engine | ||
| 663,475 | Dec. 11, 1900 | H. Smith | Gas Engine | ||