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Lawyer for intellectual property navigates path to his own patent

MINNEAPOLIS — If you’ve ever wanted to patent a homemade invention, Dan and Kim McDonald’s experience with the Aardvark is both a cautionary and inspirational tale. Mr. McDonald invented the Aardvark — a kitchen strainer in the shape of a tapering, blunt-ended cone — so he could make root beer floats that didn’t erupt in a volcano of foam.

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