40 years ago today, on August 8, 1984, Charles Hull filed a patent application for stereolithography (SLA), the first additive manufacturing technique in history. We're honored to have Chuck Hull on the 3DPOD podcast today. Chuck tells us how he started 3D Systems (NYSE: DDD), scaled the company, and shares some of the secrets of his success. We discuss how the industry is evolving, tough times, why he still comes into the office, and his fascination with bioprinting. We loved talking to Chuck!