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ZIV KOREN/POLARIS FOR TIME

DAVID YAISH: Wisair is developing high-bandwidth tech for large video files

When Martin Cooper talks, tech people listen. After all, in 1973, Cooper invented the first cell phone small enough to use outside a car, forever changing the way the world lives and works. But today, some think this wry, lively elder statesman, now 75, is working to undermine the very mobile behemoths he helped create. That's because he's the founder and chairman of ArrayComm, a San Jose, California, company that has radically redesigned the antennae that send cellular signals to handsets — it may be a better product, but it's also a threat to some hundreds of billions of dollars invested...

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