The Cell Phone turns forty this month.
From The Verge:
The Verge Interview: Marty Cooper, father of the cellphone
Marty Cooper quite literally invented the cellphone during his tenure as a division manager at Motorola, demonstrating it for the first time in April of 1973 when he famously called his chief rival - Bell Labs' Joel Engel - to personally deliver the news that he'd been beaten.
A really nice interview.