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The timeline of historic inventions is a chronological list of ... Actual inventor unknown since it seemed to already be a common item ... 1940: Pu-239 isotope ...
The following articles cover the timeline of United States inventions: 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
The electric guitar was a key instrument in the development of musical styles that emerged since the late 1940s, such as Chicago blues, early rock and roll, rockabilly, and 1960s blues rock. Electric guitars are used in almost every popular music genre. [239]
Mobile phones had been around since the 1940s, but their enormous size and a limited number of channels rendered them impractical. Cooper placed the world's first cellphone call from his car in ...
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.
This is a list of obsolete technology, superseded by newer technologies. Obsolescence is defined as the "transition from available to unavailable from the manufacturer in accordance with the original specification." [1] Newer technologies can mostly be considered as disruptive innovation. Many older technologies co-exist with newer alternatives ...
As a result, the United States has been the birthplace of 161 of Encyclopædia Britannica ' s 321 Greatest Inventions, including items such as the airplane, internet, microchip, laser, cellphone, refrigerator, email, microwave, personal computer, liquid-crystal display and light-emitting diode technology, air conditioning, assembly line ...
1940: Cavity magnetron improved by John Randall (1905–1984) and Harry Boot (1917–1983); consequently a critical component in microwave ovens and some radar. [60] Late-1940s/early 1950s: The microchip invented by Geoffrey W.A. Dummer (1909–2002). 1963: High strength carbon fibre invented at the Royal Aircraft Establishment in 1963.