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Back in 2001, Hitachi announced the development of a 0.4mm x 0.4mm external antenna μ-Chip, a tiny, powder-like RFID chip like the ones shown in the image displayed above, and in 2003 the company promoted the development of an embedded antenna version of the μ-Chip: In 2006, Hitachi announced the development and verified operation of a 0.15 x 0.15 mm contactless IC chip: In 2007, news accounts reported a miniaturization step beyond the original μ-Chip, an external antenna version that was reported as being 60 times smaller: Contrary to some versions of this item, however, we have not yet seen any official mention of such smart dust technology having GPS capabilities or being able to survive in a functional state after being ingested.
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