Ski-Optometer (Woolf Phoropter)
date: label: date made
content: 1913-1917
label: patent date
content: 1910-12-27
notes: label: Description
content: A phoropter is an optical testing device. Inscriptions on this example read “MICHAEL WOOLF / NEW YORK” and “PAT. DEC. 27, 1910.” Nathan A. Shigon (1868-1920), the inventor, was an optician who was born in Russia and who died in New York. Michael Woolf was a manufacturing optician.
label: Description
content: Ref: Nathan A. Shigon, “Refractometer,” U.S. Patent 979,578A (Dec. 27, 1910).
label: Description
content: Michael Woolf, ad for the Ski-Optometer, in Optical Journal and Review of Optometry (Sept 5, 1912), p. 1093.
label: Location
content: Currently not on view
topic: label: associated subject
content: Orthoptics
label: associated subject
content: Ophthalmology
setName: label: See more items in
content: Medicine and Science: Medicine
label: See more items in
content: Health & Medicine
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: ZZ.RSN83545U31
label: patent number
content: US979578A
objectType: label: Object Name
content: Phoropter
label: Other Terms
content: Phoropter; Diagnostic Medicine