When was the first lawn mower invented?
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In which decade were the first successful diode and triode vacuum tubes invented?
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Who is the English physicist responsible for the 'Big Bang Theory'?
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What 'game' was first produced by the Southern Novelty Company in Baltimore, Maryland in 1892?
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Which insurance salesman invented the fountain pen in 1884?
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When was the first elevator built?
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What charge card, developed in 1950, was the first to be accepted nationally in the US?
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What Enrico Fermi invented?
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Which of the following was first patented by an Australian in 1889?
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Who among the following invented the small pox vaccine?
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What invention is credited to the Russian born American inventor Vladimir Kosma Zworykin?
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Benjamin Franklin was a prolific inventor. He invented the lightning rod, the Franklin stove, studied electricity, discovered the Gulf Stream, started the first library, and on and on. Among his many other inventions, what musical instrument did he invent?
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What Thomas Davenport invented?
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What Elisha Otis invented?
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Where was the yo-yo invented?
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For what does the world owe Almon Strowger a debt of gratitude?
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In which decade was the telegraph invented?
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What inspired reflecting road lights to be invented?
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When were blue jeans invented?
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Who invented Electric Generator?
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