When William Liddiard saw a truck and trailer struggle to parallel park, he decided to figure out a solution. » Subscribe to CNBC: About CNBC: From 'Wall Street' to 'Main Street' to award winning original documentaries and Reality TV series, CNBC has you covered. Experience special sneak peeks of your favorite shows, exclusive video and more. Connect with CNBC News Online Get the latest news: Find CNBC News on Facebook: Follow CNBC Ne
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