Given that the telephone and Radio were both invented over 150 years ago, why did it take until the 80s to get mobile phones started? - Quora
Radio in America, from Its Invention to Telstar
Media Studies Flashcards | Quizlet
Telephones Across the Smithsonian | Smithsonian Institution
Mobile radio telephone - Wikipedia
First Phone Broadcast, January 1947 Radio-Craft - RF Cafe
History of mobile phones - Wikipedia
Who really invented the telephone? - BBC Science Focus Magazine
Car phone - Wikipedia
Who invented the cell phone? | HowStuffWorks
A Time Before Phones: The Inventions Leading Up to the Telephone | THG Blog
Telephones Across the Smithsonian | Page 7 | Smithsonian Institution
Invention of radio - Wikipedia
Digital Collections · Night of the Living Radio Early History panel · Digital Collections · Digital Collections @ Union
Telephone History: First Transatlantic Speech Transmission | TIME
Is It a Radio or Telephone? - Phone, Cell, Phones, and Wires - JRank Articles
50 years ago, he made the first cell phone call | CNN Business
History of radio - Wikipedia
On April 3, 1973, The First Cell Phone Call Was Made. – Station HYPO
The history of headphones and the beginnings of portable sound
first cell phone - Newspapers.com™
History of radio - Wikipedia
Radio | Definition, History, & Facts | Britannica
Q&A: Motorola's Martin Cooper, who made the first cell phone call
:max_bytes(150000):strip_icc()/GettyImages-654313946-5c4b7c5e46e0fb00014a2ad9.jpg "The Invention of Radio Technology")