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1439: Printing press in Mainz, Germany: The printing press is invented in the Holy Roman Empire by Johannes Gutenberg before 1440, based on existing screw presses. The first confirmed record of a press appeared in a 1439 lawsuit against Gutenberg. [376] Mid 15th century: The Arquebus (also spelled Harquebus) is invented, possibly in Spain. [377 ...
1920 Jungle gym The jungle gym, also known as monkey bars or climbing frame, is a piece of playground equipment made of many pieces of thin material, such as metal pipe or, in more current playgrounds, rope, on which children can climb, hang, or sit.
Print/export Download as PDF; Printable version; In other projects ... The following articles cover the timeline of United States inventions:
Jerome H. Lemelson (1923–1997), U.S. – inventions in the fields in which he patented make possible, wholly or in part, innovations like automated warehouses, industrial robots, cordless telephones, fax machines, videocassette recorders, camcorders, and the magnetic tape drive used in Sony's Walkman tape players.
Marie Curie (1867–1934), pioneering research into radioactivity. Women inventors have been historically rare in some geographic regions. For example, in the UK, only 33 of 4090 patents (less than 1%) issued between 1617 and 1816 named a female inventor. [1]
The 1920s (pronounced "nineteen-twenties" often shortened to the "' 20s" or the "Twenties") was a decade that began on January 1, 1920, and ended on December 31, 1929. . Primarily known for the economic boom that occurred in the Western World following the end of World War I (1914–1918), the decade is frequently referred to as the "Roaring Twenties" or the "Jazz Age" in America and Western ...
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