1. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

2. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.

3. Who invented Television ?

Answer:

John Logie Baird

4. Who invented Safety razor ?

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

5. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

6. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

7. Who invented Periodic table ?

Answer:

Dmitri Mendeleev invented Periodic Table