What plaything was invented by Joe McVicker in 1956?
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1) What charge card, developed in 1950, was the first to be accepted nationally in the US?
2) 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.
3) Who invented Jet Engine?
4) The Manhattan Project was started by President Roosevelt in 1942 to ensure that the U.S. beat the Germans in developing a nuclear bomb. Whom did Roosevelt appoint as scientific head the Manhattan Project?
5) When was barb wire patented?