1838 - 1840 (2 years)
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Date |
Event(s) |
| 1 | 1838 | - 1838: Samual Morse invents Morse Code.
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| 2 | 1839 | - 1839: Frenchmen, Louis Daguerre and J.N. Niepce co-invent Daguerreotype photography.
- 1839: Kirkpatrick Macmillan invents a bicycle.
- 1839: American, Charles Goodyear invents rubber vulcanization.
- 1839: Welshmen, Sir William Robert Grove conceives of the first hydrogen fuel cell.
- 1839: American, Thaddeus Fairbanks invents platform scales.
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| 3 | 1840 | - 1840: Englishmen, John Herschel invents the blueprint.
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