1. Who invented Bicyle ?

Answer: Kirkpatrick Macmillan of Britain.

2. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

3. Who invented Refrigerator ?

Answer:

Oliver Evans in 1805

4. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

5. Who invented Safety Pin ?

Answer: Walter Hunt of U.S.A. in 1849

6. Who invented Vitamin D ?

Answer:

Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922

7. Who invented Safety razor ?

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