One of my favorite inventor stories isn’t about a billionaire founder or a famous tech CEO. It’s about a man most people have never heard of. David Sheridan. He grew up in a poor immigrant family in Brooklyn and left school after the 8th grade to work manual jobs. No engineering degree. No research lab. But he noticed something in hospitals that bothered him. At the time, breathing tubes and catheters used in surgery were made of rubber and reused over and over again after sterilization. That meant infections could spread between patients. Sheridan had a simple idea. Instead of reusing the tubes, make them cheap enough to throw away. That idea became the modern disposable plastic catheter and endotracheal tube, which dramatically reduced surgical infections and saved countless lives. Over time he built multiple companies and held more than 50 patents. Doctors later called him “The Catheter King.” No university lab. No massive funding. Just an inventor who saw a problem and refused to ignore it. Sometimes the most powerful inventions come from people who simply ask one question: “Why are we still doing it this way?”

Posted by Eugene Allen at 2026-03-04 16:48:56 UTC