Rotoscope-visible speech cathode ray tube
date: label: date made
content: 1946
label: associated date
content: 1942
name: label: associated institution
content: Bell Laboratories
label: Associated Name
content: Johnson, J. B.
label: maker
content: Bell Laboratories
notes: label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from J. B. Johnson and Bell Telephone Laboratories
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.327775
label: catalog number
content: 327775
label: accession number
content: 267518
objectType: label: Object Name
content: Electron Tube
label: Object Name
content: cathode ray tube
physicalDescription: label: Measurements
content: overall: 21 in x 10 in; 53.34 cm x 25.4 cm