1. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

2. Who invented Television ?

Answer:

John Logie Baird

3. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

4. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

5. Who invented paper ?

Answer:

Cai Lun

6. Who invented Safety razor ?

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

7. Who invented Relativity Theory ?

Answer: Einstein of Germany in 1905.