1. Who invented Helicopter ?

Answer:

Igor Sikorsky

2. Who invented Safety razor ?

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

3. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

4. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

5. Who invented Television ?

Answer:

John Logie Baird

6. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

7. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849