The most common window regulator on the road today is a scissorlike mechanism that opens to push up the window.

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In its latest incarnation, Fenelon's window regulator is less than half the weight of the arm-and-sector design, 2 pounds rather than 5.

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Even a Dura competitor, ArvinMeritor (nyse: ARM - news - people ), admits the world could use another window regulator.

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