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Keystone passes in U.S. Senate, faces Obama veto

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Shawn Peterson, 44, of Woonsocket, holds the diesel air filter cleaner he invented that his company is beginning to market internationally. A patent is pending on the device. (Ross Dolan/Republic)

Woonsocket company develops tool to clean ag air filters

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WOONSOCKET — The adage that necessity is the mother of invention definitely proved true in the case of a Woonsocket company that’s growing a business with international potential.

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“I guess I just saw a need,” said Shawn Peterson, 44, developer of the Diesel Air Filter Cleaner, a device that does just what its name suggests.

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