General Knowledge :: Inventions
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Who invented the BALLPOINT PEN?
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In which decade was the first solid state integrated circuit demonstrated?
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What J. B. Dunlop invented?
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Which scientist discovered the radioactive element radium?
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What is the name of the CalTech seismologist who invented the scale used to measure the magnitude of earthquakes?
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This statesman, politican, scholar, inventor, and one of early presidents of USA invented the swivel chair, the spherical sundial, the moldboard plow, and the cipher wheel.
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Where is the village of Branston, after which the famous pickle is named?
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