1. Who invented “AC Motor”?
Nikola Tesla
2. Who invented “AC Transformer”?
William Stanley
3. Who discovered “Actinium”?
Andre Louis Debierne
4. Who invented “Adding Machine”?
Blaise Pascal
5. Who invented “Air Brake”?
George Westinghouse
6. Who invented “Air Conditioning”?
W.H. Carrier
7. Who invented “Air Pump”?
Otto von Guericke
8. Who invented “Airplane”?
Wilbur Wright and Orville Wright
9. Who invented “AK-47”?
Mikhail Kalashnikov
10. Who discovered “Argon”?
Sir William Ramsay and Lord Rayleigh
11. Who invented “Artificial Heart”?
Robert K. Jarvik
12. Who invented “Artificial Radioactivity”?
Madam Curie and F Joliot
13. Who invented “Aspirin”?
Dreser
14. Who invented “Atom bomb”?
Otto Hahn
15. Who invented “Automated Electric Elevator”?
Alexander Miles
16. Who invented “Automatic Rifle”?
John Browning
17. Who discovered “Bacteria”?
Anton van Leeuwenhoek
18. Who invented “Ballistic Missile”?
Wernher Von Braun
19. Who invented “Ballpoint Pen”?
Georg and Ladislao Biro
20. Who invented “Barometer”?
Evangelista Torricelli