Build a Better Mousetrap : Make Classic Inventions, Discover Your Problem-Solving Genius, and Take the Inventor's Challenge by Ruth Kassinger (2002, Trade Paperback)
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ISBN-13: 9780471395386, 978-0471395386. These solutions have included such incredible inventionsas the parachute, the periscope, the solar water heater, thesuspension bridge, the stethoscope, and many more.