1. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

2. Who invented Bacteria ?

Answer: Leeuwenhock of Netherlands in 1683

3. Who invented Super Computer ?

Answer:

Seymour Cray

4. Who invented Bleaching Powder ?

Answer: Tennant of Britain in 1798

5. Who invented Transformer ?

Answer:

Ottó Bláthy

6. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

7. Who invented Air Conditioning ?

Answer:

Willis Carrier in 1902