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By the 1930s, the broadcast receiver had become a common household item, with standardized controls that anyone could use. [85] The invention of the transistor in 1947 again revolutionized radio technology, making truly portable receivers possible, beginning with transistor radios in the late 1950s. [86]
The timeline of historic inventions is a chronological list of particularly significant technological inventions and their inventors, where known. [ a ] The dates in this article make frequent use of the units mya and kya , which refer to millions and thousands of years ago, respectively.
Primitive digital cameras become commercially available by 1989/1990 and slowly become more affordable and appealing; mostly replacing traditional film by 2007. PDAs (Personal Digital Assistants) become popular in the mid-1990s with the release of the touchscreen Apple Newton in 1993, although it has a monochrome screen.
The names of some modern inventions (atomic bomb, credit card, robot, space station, oral contraceptive and borazon) exactly match their fictional predecessors. A few works correctly predicted the years when some technologies would emerge, such as the first sustained heavier-than-air aircraft flight in 1903 and the first atomic bomb explosion ...
On September 16, 1930, Lehberger was issued U.S. patent #1,775,861. [232] 1930 Car audio. Car audio/video (car AV) is a sound or video system fitted in an automobile. In 1930, the Galvin Corporation introduced the first commercial car radio, the Motorola model 5T71, which sold for between $110 and $130 and could be installed in most popular ...
This follows since the 1930s, several improvements to the manufacturing technology. The company Ampex introduces the "VR 1000" the first video recorder. That same year, CBS uses it for the first magnetic video tape recording (VTR) from. Although other programs are produced in color since 1954, the VTR cannot record color.
1839, 1930: Discovery of polystyrene by Eduard Simon, was made a commercial product by IG Farben in 1930 [132] c. 1840: Nitrogen-based fertiliser by Justus von Liebig, [133] important innovations were later made by Fritz Haber and Carl Bosch (Haber process) in the 1900s [134] 1846: Discovery of guncotton by Christian Friedrich Schönbein [135]
A timeline of United States inventions (after 1991) encompasses the ingenuity and innovative advancements of the United States within a historical context, dating from the Contemporary era to the present day, which have been achieved by inventors who are either native-born or naturalized citizens of the United States.