What did Frederick add to baseball in 1878?
Frederick Winthrop Thayer of Massachusetts, and the captain of the Harvard University Baseball Club, received a patent for his baseball catcher's mask on February 12, 1878.
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Frederick Winthrop Thayer of Massachusetts, and the captain of the Harvard University Baseball Club, received a patent for his baseball catcher's mask on February 12, 1878.
Keywords:
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