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Genetic evidence from body lice suggests a range of dates centering over 100 thousand years ago. [28] The first bone scrapers appropriate for scraping hides to make supple leather were found in Morocco dating to 90–120,000 years ago. [29] [30] 164 kya – 47 kya: Heat treating of stone blades in South Africa. [31]
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
In 1924, American engineer Lloyd Espenschied invented the radio altimeter. However, it took 14 years before Bell Labs was able to put Espenschied's device in a form that was adaptable for aircraft use. [194] 1925 Automatic volume control. Automatic volume control or automatic gain control (AGC) is an adaptive system found in many electronic ...
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.
The tape could be manufactured quickly and cheaply, since paper was much less expensive than copper. In 1845, Edward Maynard patented his new firearm invention which in later years, would be widely used in the American Civil War. [93] 1845 Baseball. A sketch of an early baseball game played at Elysian Fields, Hoboken, New Jersey
The automobile in American history and culture: a reference guide (Greenwood, 2001). Condit, Carl W. The railroad and the city: a technological and urbanistic history of Cincinnati (The Ohio State University Press, 1977) online. Eckermann, Erik. World history of the automobile (SAE International, 2001). Gkoumas, Konstantinos, and Anastasios ...
For the past 80 years, the United States has been integral in fundamental advances in telecommunications and technology. For example, AT&T's Bell Laboratories spearheaded the American technological revolution with a series of inventions including the first practical light emitted diode ( LED ), the transistor , the C programming language , and ...
Ancient history – Aggregate of past events from the beginning of recorded human history and extending as far as the Early Middle Ages or the Postclassical Era. The span of recorded history is roughly five thousand years, beginning with the earliest linguistic records in the third millennium BC in Mesopotamia and Egypt .