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In 1945, the James first exhibited his new toy at the Gimbels, a department store located in Philadelphia. He sold 400 Slinkys in 90 minutes which was the start of a sensation that continues to this day. [303] 1945 Microwave oven. A microwave oven with a turntable. A microwave oven cooks or heats food by dielectric heating.
Timeline of United States inventions (before 1890), before the turn of the century; Timeline of United States inventions (1890–1945), before World War II; Timeline of United States inventions (1946–1991), during the Cold War; Timeline of United States inventions (after 1991), after the dissolution of the Soviet Union
The modern-day provisions of the law applied to inventions are laid out in Title 35 of the United States Code (Ch. 950, sec. 1, 66 Stat. 792). From 1836 to 2011, the United States Patent and Trademark Office (USPTO) has granted a total of 7,861,317 patents [7] relating to several well-known inventions appearing throughout the timeline below.
An axe made of iron, dating from the Swedish Iron Age, found at Gotland, Sweden: Iron—as a new material—initiated a dramatic revolution in technology, economy, society, warfare and politics. A technological revolution is a period in which one or more technologies is replaced by another new technology in a short amount of time.
The project bore fruit when the first such bomb was exploded in New Mexico on July 16, 1945. The development of the bomb and its use against Japan in August 1945 initiated the Atomic Age, a time of anxiety over weapons of mass destruction that has lasted through the Cold War and down to the anti-proliferation efforts of today.
1945: The atomic bomb is developed by the Manhattan Project and swiftly used in August 1945 in the atomic bombings of Hiroshima and Nagasaki, effectively ending World War II. 1945: Percy Spencer, while employed at Raytheon, would patent a magnetron based microwave oven. [480] 1945: Willard Libby began his work on radiocarbon dating.
He envisioned a future of unbounded plenty and the imminent end of poverty in America. A year after his election, the stock market crashed, and the nation's economy slipped downward into the Great Depression. [47] After the crash, Hoover attempted to put in place many efforts to restore the economy, especially the fast-sinking agricultural sector.
July 16 – Nuclear testing: the Trinity test, the first test of an atomic bomb, using 6 kilograms of plutonium, succeeds in detonating an explosion equivalent to that of 20 kilotons of TNT. August 6 and 9 – Atomic bombings of Hiroshima and Nagasaki make the world aware of the power of nuclear weapons.