1. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

2. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

3. Who invented Printing Press ?

Answer:

Johannes Gutenberg

4. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902

5. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

6. Who invented Floppy disk ?

Answer: IBM in 1970

7. Who invented Laptop ?

Answer:

Adam Osborne in 1981.