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INVENTIONS

Inventions
Who invented the BALLPOINT PEN?

Waterman Brothers
Write Brothers
Bicc Brothers
Biro Brothers

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Inventions
In which decade was the first solid state integrated circuit demonstrated?

1970s
1960s
1950s
1980s

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Inventions
What J. B. Dunlop invented?

Rubber boot
Pneumatic rubber tire
Automobile wheel rim
Model airplanes

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Inventions
Which scientist discovered the radioactive element radium?

Albert Einstein
Marie Curie
Isaac Newton
Benjamin Franklin

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Inventions
When was barb wire patented?

1900
1874
1840
1895

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