1. Who invented Laptop ?

Answer:

Adam Osborne in 1981.

2. Who invented Stainless Steel ?

Answer: Harry Brearley of Britain in 1913.

3. Who invented Open Heart Surgery ?

Answer:

Dr. Daniel Hale Williams

4. Who invented Steam Engine (Piston)

Answer: Thomas Newcomen of Britain in 1712

5. Who invented c language

Answer:

Dennis Ritchie

6. Who invented Transformer ?

Answer:

Ottó Bláthy

7. Who invented Automatic rifle ?

Answer: John Browning of U.S.A. in 1918.