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Start Over You searched for: Subjects Anesthetics, Inhalation Remove constraint Subjects: Anesthetics, Inhalation Subjects Patents as Topic Remove constraint Subjects: Patents as Topic Authors Morton, W. T. G. (William Thomas Green), 1819-1868 Remove constraint Authors: Morton, W. T. G. (William Thomas Green), 1819-1868

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2. Before the Commissioner of Patents, in the matter of extension of letters patent of the United States, granted to William T.G. Morton, on the 12th day of November, 1946, for "An improvement in surgical operations": statement and account, pursuant to section eighteen of the Act of Congress, passed July 4, 1836