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The prototype telephone was invented by Alexander Graham Bell in 1876. The phonograph is invented in 1877 by Thomas Edison. The 6.35mm headphone jack was invented in 1878 and is still widely used today. The first version of the light bulb was invented by Thomas Edison in 1879. The steam drill is invented in 1879.
The first rotary can opener with a cutting wheel was invented in 1870 by William W. Lyman, of Meriden, Connecticut, who received a U.S. Patent 105,346 on July 12, 1870. In 1925 the Star Can Opener Company of San Francisco improved on Lyman's wheel blade by adding a second, serrated or toothed wheel, called a "feed wheel" or "turning gear" to ...
The South's agriculture was not highly mechanized. The value of farm implements and machinery in the 1860 Census was $81 million; by 1870, there was 40% less, or $48 million worth. Many old tools had broken through heavy use and could not be replaced; even repairs were difficult. [126]
Co-invented in 1935 by Charles Richter along with Beno Gutenberg of the California Institute of Technology, the Richter magnitude scale was firstly intended to be used only in a particular study area in California, and on seismograms recorded on a particular instrument, the Wood-Anderson torsion seismometer. [257] 1935 Black light
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
American researchers made fundamental advances in telecommunications and information technology. For example, AT&T's Bell Laboratories spearheaded the American technological revolution with a series of inventions including the light emitting diode , the transistor, the C programming language, and the UNIX computer operating system.
They invented complex systems with a separate key for each letter of the alphabet. In 1832, Samuel Morse, an American artist, with help from scientist Leonard Gale, searched for a simpler idea for an electromagnetic recording system. Telegraphers would tap their fingers on a knob and the system imprinted dots and dashes onto a moving strip of ...
2004: First podcast, invented by Adam Curry and Dave Winer, is a program made available in digital format for download over the Internet and it usually features one or more recurring hosts engaged in a discussion about a particular topic or current event. [544] [545] [546] 2005: YouTube, the first popular video-streaming site, was founded