49. Who is the only U.S. President to invent and patent something?
(a) Abraham Lincoln (b) Theodore Roosevelt (c) Thomas Jefferson (d) Rutherford B. Hayes
Answer
Answer : (a)
Explanation
Explanation : In 1849 Honest Abe invented a method to aid ships that got stuck on sandbars. He called it A Device for Buoying Vessels Over Shoals. It was never used.
Important Inventions and Discoveries in World » Exercise - 177. In which decade was the SPICE simulator introduced? (a) 1950s (b) 1960s (c) 1970s (d) 1980s
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