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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 automobiles. Inventors Paul Galvin and Joe Galvin came up with the name Motorola when their ...
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 Lower Paleolithic period lasted over 3 million years, during which there many human-like species evolved including toward the end of this period, Homo sapiens.The original divergence between humans and chimpanzees occurred 13 (), however interbreeding continued until as recently as 4 Ma, with the first species clearly belonging to the human (and not chimpanzee) lineage being ...
Hub van Doorne (1900–1979), Netherlands – Variomatic continuously variable transmission; John Thompson Dorrance (1873–1930), U.S. – Condensed soup; Amanda Minnie Douglas (1831–1916) – writer and inventor (portable folding mosquito net frame) Charles Dow (1851–1902), U.S. – Dow Jones Industrial Average
The first invention credited to Parpart is a street sweeper designed to automate the process of cleaning city streets. Parpart filed two patents for this invention (No. 649,609 [32] in 1899 and no. 762,241 [33] in 1901), both of which listed Hiram D. Layman as co-inventor despite his being only an investor.
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.
This timeline lists significant discoveries in physics and the laws of nature, including experimental discoveries, theoretical proposals that were confirmed experimentally, and theories that have significantly influenced current thinking in modern physics.
March 4, 1901 – President McKinley begins second term; Roosevelt becomes the 25th vice president. September 6, 1901 – McKinley is shot, in Buffalo, New York.; September 14, 1901 – President McKinley dies, Vice President Roosevelt becomes the 26th president [1]