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Date |
Event(s) |
| 1 | 1840 | - 1840: Englishmen, John Herschel invents the blueprint.
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| 2 | 1841 | - 1841: William H. Harrison president of the USA. William Henry Harrison succumbed to pneumonia 1841.
- 1841: John Tyler president of the USA 1841-1845. John Tyler the first vice president to succeed to the presidency due to death of a president.
- 1841: Samuel Slocum patents the stapler.
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| 3 | 1842 | - 1842: Joseph Dart builds the first grain elevator.
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| 4 | 1843 | - 1843: Alexander Bain of Scotland, invents the facsimile.
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| 5 | 1844 | - 1844: Englishmen, John Mercer invents mercerized cotton.
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1840 - 1844 (3 years)