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Timeline: Ethel Dyer: Family History
Discovering our American, Canadian and European Ancestors

- Yes, date unknown
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Date |
Event(s) |
| 1 | 1902 | - 1902: Willis Carrier invents the air conditioner.
- 1902: French physicist George Claude invents neon light.
- 1902: The lie detector or polygraph machine is invented by James Mackenzie.
- 1902: The birth of the Teddy Bear.
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