Hearing Aid
date: label: date made
content: 1942
name: label: maker
content: Sonotone Corporation
notes: label: Description
content: An inscription on this hearing aid reads “SONOTONE / U.S. PAT. 1.679.532 PAT / PENDING MADE IN U.S.A. / K58300.” This patent was issued to Frederick William Kranz (1887-1979), a graduate of Lawrence College who earned a physics PhD from the University of Chicago and then worked for Western Electric, Riverbank Laboratories, Magnavox, and then Sonotone.
label: Description
content: Ref: Frederick William Kranz, “Apparatus for Aiding Hearing,” U.S. Patent 1,679,532 (Aug. 7, 1928).
label: Location
content: Currently not on view
place: label: place made
content: United States: New York, Ossining
setName: label: See more items in
content: Medicine and Science: Medicine
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1991.0143.13
label: catalog number
content: 1991.0143.13
label: accession number
content: 1991.0143
label: serial number
content: K58300
objectType: label: Object Name
content: Hearing Aid
label: Other Terms
content: Hearing Aid; Prosthesis; Electric
physicalDescription: label: Physical Description
content: plastic, bakelite (overall material)
label: Physical Description
content: plastic (overall material)
label: Physical Description
content: metal (overall material)
label: Physical Description
content: black (overall color)
label: Measurements
content: overall: 2 cm x 10.5 cm x 5.8 cm; 13/16 in x 4 1/8 in x 2 5/16 in