1. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

2. Who invented Hydrogen bomb ?

Answer:

Edward Teller

3. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

4. Who invented Safety razor ?

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

5. Who invented Vaccine of Rabies ?

Answer: Louis Pasteur of France in 1885

6. Who invented Aeroplane

Answer: Orville & Wilbur Wright in 1903

7. Who invented Nylon ?

Answer:

Wallace Carothers