Marconi's Wireless Telegraph
Guglielmo Marconi
📌 Pin it
In late 1894, 20-year-old Guglielmo Marconi began experiments in the attic of his family's Villa Griffone at Pontecchio, Italy, applying Heinrich Hertz's discovery of electromagnetic waves to sending messages without wires. By early summer 1895 he could transmit across an intervening hill — about two kilometres — with success signalled first by a waving handkerchief, then, as the distance grew, by firing a gun.
The Italian government showed no interest, so Marconi's mother sent him to England, where her family had connections. He filed British patent 12039 on June 2, 1896 — the world's first patent for wireless telegraphy — demonstrated on Salisbury Plain, and in July 1897 founded the Wireless Telegraph & Signal Company in London.
The range kept climbing: across the English Channel in 1899, then, on December 12, 1901, a faint three-dot 'S' travelled from Poldhu in Cornwall to St. John's, Newfoundland — the first wireless signal across the Atlantic. In 1909 Marconi shared the Nobel Prize in Physics with Karl Ferdinand Braun.
Frequently asked
When did Marconi invent the wireless?
He began experiments in 1894 at his family's villa in Italy, achieved 2 km transmissions in summer 1895, and filed the first wireless telegraphy patent in Britain on June 2, 1896.
Did Marconi invent radio by himself?
He built on the work of Maxwell and Hertz and the coherer detectors of others, but he was the first to turn wireless waves into a practical long-distance telegraph system and a commercial business.
When was the first transatlantic wireless message?
December 12, 1901 — the letter 'S' in Morse, sent from Poldhu, Cornwall, and received at St. John's, Newfoundland, about 3,400 km away.
Why it matters today
Marconi cut the wire — his wireless telegraph became radio, radar, and everything broadcast since, from the Titanic's distress call to the device in your pocket.
More in Inventions & Industry
All →
The Telephone
A wire, a voice, and a patent filed on the same day as a rival's — the device that taught distance to speak.
The Incandescent Light Bulb
A glowing thread of carbon turned night into negotiable hours — and lit the modern city.
The Steam Locomotive
A hissing iron horse won a race in 1829 — and pulled the Victorian age along behind it.