Who invented Jet Engine?

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Who invented Jet Engine?

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1) What invention caused many deaths while testing it?

2) Ralph Samuelson was only 18 when he invented this sporting item in 1922. What was that?

3) When was barb wire patented?

4) For what does the world owe Almon Strowger a debt of gratitude?

5) Who invented the first controllable flying AEROPLANE (AIRPLANE)?

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