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Date |
Event(s) |
| 1 | 1922 | - 1922—1922: HISTORY: .Insulin invented by Sir Frederick Grant Banting.
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| 2 | 1923 | - 1923—1923: HISTORY: .Garrett A. Morgan invents a traffic signal.
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| 3 | 1924 | - 1924—1924: HISTORY: .Dynamic loudspeaker invented by Rice and Kellogg.
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| 4 | 1925 | - 1925—1925: HISTORY: .Mechanical television a precursor to the modern television, invented by John Logie Baird.
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| 5 | 1926 | - 1926—1926: HISTORY: .Robert H. Goddard invents liquid-fueled rockets.
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| 6 | 1927 | - 1927—1927: HISTORY: .JWA Morrison invents the first quartz crystal watch.
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| 7 | 1928 | - 1928—1928: HISTORY: Penecillin Developed.Scottish biologist Alexander Fleming discovers penicillin.
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1924 - 1928 (3 years)
