1. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

2. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

3. Who invented Hydrogen bomb ?

Answer:

Edward Teller

4. Who invented Nylon ?

Answer:

Wallace Carothers

5. Who invented Vitamin K ?

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

6. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

7. Who invented by Electric Lamp ?

Answer: Thomas Alva Edison of U.S.A. in 1879