For all the laurels we place atop the heads of Bill Gates and Steve Jobs as technological innovators, none can hold a candle to Thomas Edison, who held no fewer than 1,093 patents. Edison’s name will forever be associated with the light bulb (for which he perfected the filament, though he didn’t invent it) and the phonograph (below, in 1878). Oft overlooked, however, are his many other innovations. Edison patented the alkaline battery in 1906, then built an electric car that ran on it. He sold his own brand of cement, which was used to build Yankee Stadium in 1923. Movie cameras and projectors, the stock ticker, the carbon microphone, the dictation machine, the automatic telegraph—all were Edison-branded products. Edison’s company sprawled across East Orange, N.J., but the moniker based…
