general electric

William Coolidge was an American physicist who invented many things, such as ductile tungsten, which was used as the filament for incandescent light bulbs. This product not only supplanted the more brittle carbon fibers of Edison’s original design, but made it viable to mass produce light bulbs. He also invented a portable x-ray machine that …

Thomas Edison was a great inventor; that is very difficult to dispute.  We’re all familiar with the story that he invented the light bulb, the phonograph and even the motion picture.  Those things alone would define him as a genius. But, there are many things that he did in his life that you may not …