History of Mobile Phones

7月 19, 2010 · Posted in 未分類 

The Electromagnet was invented in 1825 by William Sturgeon, a British electrician. This was followed by the invention of the electric telegraph by Samuel Morse that transmit electrical signal over wires and is translated to message. The Telephone, a device that could transmit speech electrically was invented by Alexander Graham Bell in 1876.

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