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Period: to
First telphone was designed
In the 1870's two inventors, Alexander Graham Bell and Elisha Grey Both designed the first telphone. They did this independently and turned in their designs seperate. Alexander turned his in first. Bell ended up winning a legal battle over who invented the telephone. -
"Harmonic telegraph"
Bell discovered that he could hear sound over a wire while experimetning with Harmonic Telegraphs. -
Improvements in telephones
US Patent No. 174,465 was created on this date. -
outdoor telephone
First permanent outdoor telephone wire strung.
Commercial telephone service begins in the United States. -
Long distance
Long distance phone calls were established in 1880. -
Dr. Lee De Frost
Dr. Lee De Forest, began work on applying what was known as an “audion,” a three element vacuum tube, which could amplify radio waves, to telephony
