1. Who invented Safety razor ?

Answer: King Camp Gillette of U.S.A. in 1903

2. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

3. Who invented Nylon ?

Answer:

Wallace Carothers

4. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

5. Who invented Steam Engine (Condenser)

Answer: James Watt of Britain in 1765

6. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

7. Who invented Diesel Engine ?

Answer: Rudoff Diesel of Germany in 1895