The Number 1938: Properties and MeaningsPrime Factors of 1938=2x3x17x19.
The Year 1938 ADIn the year 1938 AD The ballpoint pen was invented by Ladislo Biro.
In the year 1938 AD Roy J. Plunkett invented Teflon.
In the year 1938 AD freeze-dried coffee was invented.
In the year 1938 AD: the first working turboprop engine.
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