no. he had nothing to do with the helicopter.he only invented the gramophone and the early microphone.i hope that this answer helps you a lot with work.:)
Leonardo Da Vinci invented the first most closed helicopter ideal model. But it wasn't stable at all. Later, it was improved by many other inventors
Igor Sikorsky, 1942. There were some similar...
Emile Berliner was born in Hanover, Germany, on 20 May 1851. In 1870 he moved to the United States and subsequently lived in Washington, DC, and in Boston, Massachusetts.
He is best known for...