1. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.

2. Who invented Safety razor ?

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

3. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948

4. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

5. Who invented Vitamin K ?

Answer: Doisy Dam of U.S.A. in 1938.

6. Who invented DNA Structure ?

Answer: Crick(UK), Waston(US), Wilkins(UK) in 1951

7. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.