Which failed product of the 1860s-1870s inadvertently revolutionized American industry when its inventor pivoted to create something entirely different?

Throughout history, product launches have shaped societies in unexpected ways. Some of the most influential products weren't successful in their intended purpose but had profound historical impacts nonetheless. This trivia question explores a famous product failure from the late 19th century that inadvertently changed the course of American industrial history and sparked innovation in an entirely different field.

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John Pemberton's Pemberton's French Wine Coca (which led to Coca-Cola)
Christopher Sholes' printing press improvements (which led to the QWERTY typewriter)
John D. Rockefeller's whale oil lamps (which led to Standard Oil)
Christopher Latham Sholes' mechanical meat slicer (which led to the typewriter)