Which invention's success is credited to the innovative 'razor and blades' business model, where the main product was sold at a loss to profit from necessary consumable components?

Throughout history, innovative pricing strategies have revolutionized industries and changed how consumers interact with products. From subscription models to dynamic pricing algorithms, clever pricing approaches have often been as groundbreaking as the products themselves. This trivia question explores a significant pricing innovation that fundamentally changed an entire industry and consumer behavior. Can you identify which pioneering company or inventor introduced this revolutionary pricing approach?

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King C. Gillette's safety razor (1900s)
Thomas Edison's phonograph (1890s)
Alexander Graham Bell's telephone (1870s)
Eastman Kodak's Brownie camera (1900s)