U.S. Design Patent 241,540
date: label: date made
content: 1976
notes: label: Description
content: This is a photocopy of U.S. Design Patent 241,540, filed October 25, 1974 and granted September 21, 1976. The patent is for a "console for teaching arithmetics" [sic]. Donald Charles Stephan of Poway, California; and George William Cone of La Jolla, California assigned the patent to Eric F. Burtis of Redwood, California. This design patent was used in the digitor arithmetic teaching module.
label: Description
content: For a related object, see 1986.0507.01.
label: Location
content: Currently not on view
place: label: place made
content: United States: California
setName: label: See more items in
content: Medicine and Science: Computers
creditLine: label: Credit Line
content: Centurion Industries
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: 1986.3081.13
label: catalog number
content: 1986.3081.13
label: nonaccession number
content: 1986.3081
objectType: label: Object Name
content: sheets, set of
physicalDescription: label: Physical Description
content: paper (overall material)
label: Measurements
content: overall: 11 in x 8 1/2 in; 27.94 cm x 21.59 cm