1. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

2. Who invented Vitamin C ?

Answer:

Scottish naval surgeon James Lind in 1747

3. Who invented Calculus ?

Answer: Newton of Britain in 1670.

4. Who invented Electron ?

Answer: Thomson. J of Britain in 1897

5. Who invented Steam Engine ?

Answer: Thomas Savery of Britain in 1698

6. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

7. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.