1. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

2. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

3. Who invented Neutron ?

Answer:

JAMES CHADWICK in 1932

4. Who invented Submarine ?

Answer:

John Philip Holland

5. Who invented Stethoscope ?

Answer: Laennec of French in 1819.

6. Who invented Super Computer ?

Answer:

Seymour Cray

7. Who invented Helicopter ?

Answer:

Igor Sikorsky