1. Who invented Helicopter ?

Answer:

Igor Sikorsky

2. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

3. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

4. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

5. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

6. Who invented Laser ?

Answer:

Charles H. Townes

7. Who invented Super Computer ?

Answer:

Seymour Cray