Which inventor revolutionized their industry by introducing the 'razor and blades' business model, where the main product was sold cheaply while profits came from necessary consumable components?

When we think of inventions, we often focus on products themselves rather than the revolutionary pricing strategies that helped them succeed. Throughout history, certain pricing innovations have transformed how products reach consumers and shaped entire industries. This trivia question explores a groundbreaking pricing strategy that fundamentally changed consumer access to a key invention - can you identify which inventor pioneered this approach?

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King C. Gillette (safety razor)
Thomas Edison (phonograph)
George Eastman (Kodak camera)
Chester Carlson (xerography/photocopier)