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20th-century percussion instruments (21 P) Pages in category "20th-century inventions" ... Point of sale; Popham panel; Power window; R.
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 ...
PPSh-41 (1941–1960s in USSR) – Russian submachine gun distinctive for its high rate of fire PPS (1942–1960s in USSR) – Family of submachine guns used alongside the PPSh family Thompson submachine gun (1938–1971 in USA) – Family of submachine guns designed in 1910 and onwards, The Thompson is a famous submachine gun commonly ...
The structure of DNA was determined in 1953 by James Watson, [3] [4] Francis Crick, [3] [4] Rosalind Franklin [4] and Maurice Wilkins, [3] [4] following by developing techniques which allow to read DNA sequences and culminating in starting the Human Genome Project (not finished in the 20th century) and cloning the first mammal in 1996.
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.
20th Century Fox presents in New York on an 8 m × 4 m big screen the first widescreen movie. The radio station Witzleben begins in Germany with the regular broadcasting of television test broadcasts, initially on long wave with 30 lines (= 1,200 pixels) at 12.5 image changes per second. It appear first blueprints for television receiver.
Electrification was rated the most important technical development of the 20th century as the foundational infrastructure for modern civilization. [92] This invention had a profound effect on the workplace because factories could now have second and third shift workers. [93] Shoe production was mechanized during the mid 19th century. [94]
The celebration of the 20th century’s ending expressed the popular opinion that New Year's Eve 1999 and New Year's Day 2000 marked the turn of the millennium, while strictly speaking the 20th century ended on New Year's Eve 2000 and the 21st century began on New Year's Day 2001.