The LED - older than we thought
New Scientist Technology Blog
Wednesday, April 11, 2007
Posted by Tom at 5:55 PM
If you look in an encyclopaedia, the LED was invented by four independent American research groups in 1962. But the latest edition of Nature photonics reveals that it was actually discovered by a little-known Russian genius around 40 years earlier. [...]
LED. Light Emitting Diode. A device that passes electricity in only one direction and will emit light. It is used in everything from billboards, flashlights, traffic lights, computers and even in medicine (semiconductor lasers).
Given the "prior art" on this ubiquitous technology, I wonder what the patent fallout will be.