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Which patents were issued to Mark Twain?

The American writer Mark Twain (1835-1910), whose real name was Samuel Clemens, received three patents. His first patent was issued in 1871 for suspenders. His second, issued in 1873, was for his famous "Mark Twain's Self-Pasting Scrapbook." And the third patent, in 1885, was for an educational game that helped players remember important historical dates.

Source: Levy, Richard C. The Inventor's Desktop Companion, p. 9.

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