1. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

2. Who invented watch ?

Answer:

Peter Henlein invented the first portable time piece in 1504

3. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

4. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

5. Who invented Ballistic missile ?

Answer: Wemher von Braun of Germany in 1944.

6. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

7. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.