Father of the mouse: Doug Engelbart: Engelbart is an early Internet pioneer. In 1969, ARPANET's first transmission was between nodes at Leonard Kleinrock's lab at UCLA and Engelbart's lab at Stanford. A philosopher, scientist and inventor, he'll always be known as the father of the mouse, which he patented in 1970. He never received any royalties however. His patent expired in 1987, before the personal computer revolution. Today, at 83, he heads the Bootstrap Institute.