The electric telegraph was first developed in 1837, with key working systems demonstrated that year by William Fothergill Cooke and Charles Wheatstone in Britain and, independently, by Samuel Morse in the United States.

Quick Scoop: Key Dates

  • 1794 – An early non‑electric “optical” telegraph (semaphore system) was created by Claude Chappe in France.
  • 1837 – Practical electric telegraph systems were invented and patented by Cooke and Wheatstone in England.
  • 1837 – Samuel Morse also demonstrated his version of an electric telegraph in the U.S.
  • 1844 – Morse’s famous “What hath God wrought” message was sent between Washington, D.C., and Baltimore, marking the public debut of his line and code.

In everyday usage, when people ask “when was the telegraph invented,” they almost always mean the electric telegraph, so 1837 is the standard answer.

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