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1900 Fly swatter. A fly swatter is a hand-held device for swatting and killing flies and other insects. The first modern fly-destruction device was invented in 1900 by Robert R. Montgomery, an entrepreneur based in Decatur, Illinois. [75] On January 9, 1900, Montgomery was issued U.S. patent #640,790 for the "Fly-Killer". [76] 1900 Thumbtack
It was not until 1930, he is called a " telescreen sold "at a price of 20 pounds. 1927 The first fully electronic music boxes ("Jukeboxes") used in the USA on the market. German Grammophon on sale due to a license agreement with the Brunswick-Balke-Collender Company. Its first fully electronic turntables.
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 ...
1900: Drude model by Paul Drude [449] 1900: Planck constant and Planck's law by Max Planck [450] 1900–1930: Quantum mechanics by i.a. Max Planck and Werner Heisenberg [451] 1901: Modern pyrometer by Ludwig Holborn and Ferdinand Kurlbaum [452] 1904: Boundary layer theory by Ludwig Prandtl [453] 1904: First radar system by Christian Hülsmeyer ...
Obsolete technology Replacement Still used for Bathing machine: No longer required due to changing social standards of morality Hourglass: Clock: Tasks where a fixed amount of time can be measured with a low-tech solution: Exposure time tracker in saunas (where electronics might be damaged by the heat or ultraviolet light); retro kitchen timers, board games, other short-term timers.
The cotton gin, invented by Eli Whitney, revolutionized slave-based agriculture in the Southern United States.. The technological and industrial history of the United States describes the emergence of the United States as one of the most technologically advanced nations in the world in the 19th and 20th centuries.
History of technology by type; List of science timelines; The year 1900 in science and technology involved some significant events, listed below. Aeronautics