1. Who invented Automatic rifle ?

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

2. Who invented Proton ?

Answer:

Ernest Rutherford

3. Who invented Nylon ?

Answer:

Wallace Carothers

4. Who invented Transformer ?

Answer:

Ottó Bláthy

5. Who invented Helicopter ?

Answer:

Igor Sikorsky

6. Who invented Transistor ?

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

7. Who invented Locomotive ?

Answer:

George Stephenson was first to buit steam locomotives.