patent model, railroad switch signal
date: label: date made
content: ca 1870
label: date made
content: ca. 1870
label: associated dates
content: 1870 02 22 / 1870 02 22
label: patent date
content: 1870-02-22
name: label: inventor
content: Efner, Henry A.
label: inventor
content: Boynton, Charles
notes: label: Location
content: Currently not on view
place: label: associated place
content: Japan
label: associated place
content: United States: Michigan, Marshall
setName: label: See more items in
content: Work and Industry: Transportation, Railroad
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: TR.309328
label: accession number
content: 89797
label: catalog number
content: 309328
label: patent number
content: 100,018
objectType: label: Object Name
content: patent model, railroad switch signal
label: Other Terms
content: patent model, railroad switch signal; patent model, switch signal; Railroad; Signal