Xenarc Small Touchscreen Solutions, a Brief History - American professor - Samuel Hurst. It was he, who in 1971 put forward the idea of creating a small touchscreen and then he immediately implemented it.
Touchscreen - Wikipedia
The Evolution of Touchscreen Technology - MicroTouch
Invention of Touch Screens - A Brief History of Small Touchscreen Advancements by Xenarc Technologies Blog
Touchscreen - Wikipedia
Who invented touch screens? - Quora
Invention of Touch Screens - A Brief History of Small Touchscreen Advancements by Xenarc Technologies Blog
The 2006 LG Prada was the first capacitive touchscreen phone
History of mobile phones What was the first mobile phone?
The History of Touchscreen Technology
Touchscreen - Wikipedia