On March 7, 1876, the U.S. Patent Office issued to a young inventor named Alexander Graham Bell what is arguably the most valuable patent ever: entitled "improv

The invention of the telephone is a subject of great controversy, central is which is the patent issued to Alexander Graham Bell on March 7, 1876. Many problems

Alexander Graham Bell invented the telephone or did he? Inventor Antonio Santi Giuseppe Meucci was also working on a telephone at the same time. Watch Meucci an

Fernsprechtechnik, Telefonie (Technik).