William A. Baum (1891-1964) invented a machine for measuring blood pressure, termed it a Baumanometer and established a firm to make and market it. The W. A. Baum & Co. donated this example to the Smithsonian in 1923.
Ref: William A. Baum, “Manometer,” U.S. Patent 1,594,039 (July 27, 1926), assigned to W. A. Baum Co.; the patent application was filed in 1920.
“W. A. Baum, Inventor of a Medical Device,” New York Times (Oct. 27, 1964), p. 39.
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