There's always a danger in over-complicating products. Simple is so often best. The apocryphal story of NASA spending millions crafting a space pen while Soviet cosmonauts used a pencil is often cited as a prime example, even if it's actually not true . Perhaps it's not surprising that Dyson has got into hot water trying to reinvent the electric toothbrush . The Chinese invented the first bristle toothbrush during the Ming dynasty. That concept muddled along quite nicely until 1937, when Tomlinson Moseley filed a patent for the earliest electric toothbrush. After more than 400 years, the...

Source: Ars Technica