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light signals
New visible-light communications system does away with radio signals
Dec 19, 2008
Serkan Toto
<img src="http://www.crunchgear.com/wp-content/uploads/2008/12/tamura_light.jpg"> Japan-based <a href="http://www.tamura-ss.co.jp/en/index.html">Tamura</a> has developed a communications system that'