1. Who invented Telescope ?

Answer: Hans Lippershey of Netherlands in 1608.

2. Who invented Submarine ?

Answer:

John Philip Holland

3. Who invented Radar ?

Answer:

Sir Robert Watson-Watt

4. Who invented Transistor ?

Answer: Bardeen, Shockley & Britain of U.S.A. in 1948

5. Who invented Ball-Point Pen ?

Answer: John J. Loud of U.S.A. in 1888

6. Who invented Nylon ?

Answer:

Wallace Carothers

7. Who invented Safety razor ?

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