A guy at our church passed away years ago. I didn’t really know him, but helped out at his memorial service. He had either invented, or was on the team that developed the touch tone pad. He also developed a shipborne radar range finder in WWII that was named after him - Lorentz or something iirc.
One of the old guys mentioned that he was on a ship, and that radar saved thousands of lives. (The Japs would need to fire a round to judge the distance, while we were able to know the distance and hit them with our first round).
He had all sorts of other inventions at Bell. Always felt bad that I never know what some of the people around me are like until they pass away.
The list of Bell Labs inventions / finds is staggering.
Wish I could find the flowchart I once had that showed all the spinoff companies from the old Ma Bell - boggles the mind.