1. Who invented Safety razor ?

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

2. Who invented Morphine ?

Answer: Friderich Sertumer of Germany in 1805

3. Who invented Atomic Bomb ?

Answer: J. Robert Oppenheimer of U.S.A. in 1945

4. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

5. Who invented Calculus ?

Answer: Newton of Britain in 1670.

6. Who invented Laser ?

Answer:

Charles H. Townes

7. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903