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The modern safety pin is invented and patented on April 10, 1849, by Walter Hunt, a mechanic and independent inventor from New York, The design included a clasp to protect the point and a circular twist at the bend for a spring action.
Hunt needed money to pay off a debt he owed to a draftsman and he sold the patent for $400 to W.R. Grace & Co. which later made significant profits from the invention. More
