1. Who invented Safety razor ?

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

2. Who invented Chloroform as anaesthetic ?

Answer: James Simpson of Britain in 1847.

3. Who invented Hydrogen bomb ?

Answer:

Edward Teller

4. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

5. Who invented Barometer ?

Answer: Evangelista Torricelli of Italy in 1644

6. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

7. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.