1. Who invented Safety razor ?

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

2. Who invented Laser ?

Answer:

Charles H. Townes

3. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

4. Who invented c language

Answer:

Dennis Ritchie

5. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

6. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

7. Who invented Hydrogen bomb ?

Answer:

Edward Teller