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| 1916 September 15 |
| | | Eleven British tanks go into pioneering but ineffective action at the battle of the Somme | |
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| 1917 November 20 |
| | | Suitable ground is selected by the British at the battle of Cambrai for the first serious deployment of their new tanks | |
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| 1924 |
| | | German scientist Felix Wankel builds a model of a rotary engine, thirty years before the first prototype is manufactured | |
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| 1928 |
| | | British inventor John Logie Baird secures a patent for fibreoptic imaging | |
|  | Fibre optic gastroscopy, 1998
Wellcome Library, London
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| 1930 |
| | | British inventor Frank Whittle takes out a patent for a jet engine | |
|  | Sketches towards the design of Whittle's jet engine
National Archives, Kew
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| 1930 |
| | | US inventor Richard Drew develops Scotch Brand Cellulose Tape, the world's first transparent tape | |
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| 1938 |
| | | The Du Pont Corporation begins manufacture of a new synthetic silk yarn, subsequently known as nylon | |
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| 1942 April |
| | | British engineer Barnes Wallis designs a bouncing and rotating bomb for use against German dams | |
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| 1946 |
| | | ENIAC is the world's first general-purpose electronic calculator | |
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| 1947 |
| | | US scientist Edwin Land demonstrates a new device, the Polaroid camera, to the Optical Society of America | |
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