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John Conyers

politicianBorn: 5/16/1929Birthplace: Detroit, Michigan A lawyer and former assistant to Rep. John Dingell, Conyers was first elected to Congress in 1964. He was the first Black to chair the House…

John Blair

framer of the Constitution, justiceBorn: 1732Birthplace: Williamsburg, Va. Before participating in the Constitutional Convention of 1787, Blair helped draw up Virginia's constitution in 1776. He…

John Bardeen

Born: 1908Birthplace: Madison, Wisconsin Transistor—Bardeen, Shockley and Brattain shared the 1956 Nobel Prize for Physics for the invention of the transistor. The transistor replaced the vacuum…

John Deere

Born: 1804Birthplace: Rutland, Vt. Plow—Deere's plow had a cutting part made of steel and a moldboard made of polished wrought iron which proved more effective than implements then in use for…

John Ericsson

Born: 1803Birthplace: Vermland, Sweden Propeller—Ericsson's propeller—still the main form of marine propulsion 150 years later—replaced the inefficient and vulnerable steam-driven oars and…

John Gibbon

Born: 1903 Heart-Lung Machine. Gibbon's development of the heart-lung machine made possible the first successful open-heart operation in 1953. Improved versions allow surgeons today to perform…

John Roebling

Born: 1806 Suspension Bridge. The age of the suspension bridge was ushered in by engineer and inventor Roebling. Roebling saw the potential of steel wire as a bridge building component and invented…

John Mauchly

Born: 1907Birthplace: Cincinnati, Ohio ENIAC data translating device—Engineers Eckert and Mauchly invented ENIAC (Electronic Numerical Integrator and Calculator), the first multipurpose computer,…

John Adams

Born: 10/30/1735Birthplace: Braintree, Mass. John Adams born on Oct. 30 (Oct. 19, old style), 1735, at Braintree (now Quincy), Mass. A Harvard graduate, he considered teaching and the ministry but…

John Tyler

Born: 3/29/1790Birthplace: Charles City County, Va. John Tyler was born in Charles City County, Va., on March 29, 1790. A William and Mary graduate, he entered law practice and politics, serving in…