Marshall F. Thompson demonstrating to the Virginia Legislature

The first Roll-Call voting system was demonstrated to the U.S. Congress in 1922 by Marshall Thompson of what was then known as the Thompson Voting Machine Co.

Years later, Thompson and his brother would form International Roll-Call after innovating the voting process with a series of patents, eventually leading to a high-speed electrical voting machine in 1942.

Here, Thompson demonstrates the the Thompson Voting Machine to the Virginia Legislature in 1922.