1. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

2. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

3. Who invented Safety razor ?

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

4. Who invented Vitamin B1 ?

Answer:

Casimir Funk discovered in 1912

5. Who invented Gramophone ?

Answer:

Emile Berliner in 1887.

6. Who invented paper ?

Answer:

Cai Lun

7. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888