"WHO" invented the telephone.

On March 10, 1876 in a lab in Boston, a young inventor and teacher named Alexander Graham Bell was working on his newest invention- the telephone. He was ready to test a new transmitter. Accidentally he spilled burning acid from a battery onto his cloth. "Mr. Watson come here I want you!" He called in his telephone. Mr. Watson heard voice on his telephone and rushed to the lab.
He shouted: "Mr. Bell I heard every word you said..........!"

Photo from: http://www.slate.com/content/dam/slate/articles/technology/future_tense/2013/05/130509_FT_TELEPHONE.jpg.CROP.original-original.jpg