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This just in, a fact you probably didn't know. Many of the newer cars have a Back-Up Sensor that warns the driver.before the rear bumper actually comes in contact with something.Who invented this sensor?I'll bet you think it was Ford, maybe GM, how about Chrysler?Nope! Then how about Mercedes Benz, or possibly the French or Italian car manufacturers?Still No...It was a Japanese farmer named Fred KawasakiHis invention was simple and effective.It emitted a high-pitch squeal just before the vehicle itself backs into something.Here's where the idea came from