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.
A Brief History of Touchscreen Technology: From the iPhone to Multi-User Videowalls
Who invented touch screens? - Quora
Touchscreen - Wikipedia
Smartphone, Camera, Battery Life & Storage
A brief history of the touch screens – Ticno
Touch Screen Definition, Devices & Types - Lesson
Samsung Launches Touch Screen 'Samsung Champ' Mobile Phone
The 2006 LG Prada was the first capacitive touchscreen phone
Touchscreen: an Engineered Harmony between Humans and Machines – USC Viterbi School of Engineering
Touchscreen - Wikipedia
Touch Screen Definition, Devices & Types - Lesson
A Brief History of Touchscreen Technology - Zytronic UK