BUZZ-Ballard Power Systems Inc: Profit, revenue miss estimates
** Fuel-cell products maker's U.S.-listed shares down 3.5 pct at $2.17, Toronto shares down 4 pct at C$2.60
** Reports lower-than-expected Q1 profit, hurt by absence of high-margin licensing revenue and lower shipments of products used in telecom backup power
** Revenue plummets 34 pct to $9.3 mln, misses estimates
** Up to Tuesday's close, U.S.-listed stock had risen nearly 14 pct this year
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