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Margaret Hart (inventor) : ウィキペディア英語版 | Margaret Hart (inventor) Margaret Hart, of New York City, patented a syringe in 1885.〔Stanley, Autumn. "Mothers and Daughters of Invention: Notes for a Revised History of Technology." Rutgers University Press, 1995, p. 273.〕 According to the United States Patent Office, the patent was filed on May 1, 1885. The claim was "The combination with the discharge-pipe of an injecting apparatus and flexible nozzle section to be connected by a screw-thread, the sleeve having a conical interior, and a centrial conical spreader or core which is inserted in the end of the flexible nozzle-section and which by screwing the sleeve upon the body is brought to a bearing upon the said body".〔Official Gazette of the United States Patent Office, Volume 32, Issues 1-8. 1885, pg. 308.〕 ==References==
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