I'll bet you didn't know this!
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? No? Then how about
Mercedes Benz, or possibly the French or Italian car manufacturers?
No.
It was a Japanese farmer named Kawasaki.........
His invention was simple and effective.
It emits a high-pitch squeal just before the vehicle itself backs into something.
Here's his first prototype.. . Click Here
https://lh5.googleusercontent.com/-e...645187530.jpeg