U.S. innovators dogged by money-grubbing ‘patent trolls’. Video PBS News Hour

The U.S. economy is driven by innovation, but unwelcome “patent trolls” are gunking up the system. Patent reform bills sit idle in Congress as the “trolls” set up companies for the sole purpose, critics say, of shaking down inventors while never creating anything. “We just have to write ’em a check so they’ll go away,” says one disgusted app maker. Economics correspondent Paul Solman reports. PBS NewsHour video

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