1. Who invented Floppy disk ?

Answer: IBM in 1970

2. Who invented Helicopter ?

Answer:

Igor Sikorsky

3. Who invented Microphone ?

Answer:

Emile Berliner invented the first microphone in 1876.

4. Who invented Machine Gun ?

Answer:

Helge Palmcrantz, Swedish inventor and industrialist

5. Who invented Aspirin ?

Answer:

Felix Hoffmann invented Aspirin

6. Who invented Bakelite ?

Answer: Leo H. Baekeland of Belgium in 1907.

7. Who invented Dynamo ?

Answer:

Hypolite Pixii of France in 1832