Long ago, radar technology was vary crude. A German inventor,Heinrich Hertz, discovered the concept of radar at the end of 19th century, but it was never fully developed. Radar was later credited to a British inventor, Robert Watson-Watt. In the 1930s,Watson-Watt proved sound waves could be bounced off another object over 200 miles away. Unfortunately, Heinrich never became famous for his innovative technology, a situation that happens to many inventors.