Article Detail Who invented Helicopter ? Answer: Igor Sikorsky Ad Similar Questions : 1. Who invented Floppy disk ? Answer: IBM in 1970 2. Who invented Ball-Point Pen ? Answer: John J. Loud of U.S.A. in 1888 3. Who invented Piano ? Answer: Bartolomeo Cristofori 4. Who invented Vitamin D ? Answer: Edward Mellanby discovered Vitamin D while researching a disease called rickets in 1922 5. Who invented Electron ? Answer: Thomson. J of Britain in 1897 6. Who invented Bleaching Powder ? Answer: Tennant of Britain in 1798 7. Who invented Transistor ? Answer: Bardeen, Shockley & Britain of U.S.A. in 1948 Read more from - Important Inventions