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Lewis Edson Waterman (November 20, 1836 – May 1, 1901) was an American inventor. He held multiple fountain pen patents and was the founder of the Waterman Pen Company . His entry into fountain pen manufacturing has only recently been properly researched.
Lewis Waterman, an insurance salesman in New York City, invented the first truly functional fountain pen in the early 1880s. An apocryphal story is that a typical pen of the day leaked all over a contract he had prepared for a large policy, and by the time Waterman returned with a new document, his client had signed with someone else. [2]
German inventor Karl Ferdinand Braun invented cathode ray oscilloscope (CRO). 1901: First transatlantic radio transmission by Guglielmo Marconi 1901: American engineer Peter Cooper Hewitt invented the Fluorescent lamp. 1904: English engineer John Ambrose Fleming invented the diode. 1906: American inventor Lee de Forest invented the triode. 1908
Thomas E. Murray (October 21, 1860 – July 21, 1929) was an American inventor and businessman who developed electric power plants for New York City as well as many electrical devices which influenced life around the world, including the dimmer switch and screw-in fuse. It has been said that he "invented everything from the power plant up to ...
1875 Henry Woodward patents an electric light bulb. 1876 Pavel Yablochkov invents the Yablochkov candle, the first practical carbon arc lamp, for public street lighting in Paris. 1879 (About Christmas time) Col. R. E. Crompton illuminated his home in Porchester Gardens, using a primary battery of Grove Cells, then a generator which was better ...
A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...
Joel Solon Spira (March 1, 1927 – April 8, 2015) was an American inventor, entrepreneur, and business magnate.. He invented a version of the light-dimmer switch for use in homes around the United States and led his Lutron Electronics Company into the production of lighting controllers.
Nick Holonyak Jr. (/ h ʌ l ɒ n j æ k / huh-LON-yak; November 3, 1928 – September 18, 2022) was an American engineer and educator. He is noted particularly for his 1962 invention and first demonstration of a semiconductor laser diode that emitted visible light. This device was the forerunner of the first generation of commercial light ...