NLM Digital Collections


Search Constraints

Start Over You searched for: Subjects Anesthetics, Inhalation Remove constraint Subjects: Anesthetics, Inhalation
Number of results to display per page

Search Results

3. 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