Patent model for Edison speaking telegraph, US Patent #203018
date: label: Date made
content: 1878
name: label: maker
content: Edison, Thomas Alva
notes: label: Description (Brief)
content: A model to accompany the application for US Patent #203018, "Telephone or Speaking Telegraph," issued 30 April 1878 to Thomas A. Edison. A round hard rubber base on which is set a wooden box with a mouthpiece connected to an iron tube provided with a diaphragm and electrical contacts.
label: Location
content: Currently not on view
setName: label: See more items in
content: Work and Industry: Electricity
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.252621
label: catalog number
content: 252621
label: accession number
content: 49064
objectType: label: Object Name
content: Telephone
label: Object Name
content: experimental telephone
physicalDescription: label: Measurements
content: overall: 4 1/4 in x 5 1/4 in x 6 1/8 in x 5 1/8 in; 10.795 cm x 13.335 cm x 15.5575 cm x 13.0175 cm