Arithmetic Training Apparatus - U.S. Patent 4,089.124
date: label: date made
content: 1978
notes: label: Description
content: This is a printed U.S. Patent for "Arithmetic Training Apparatus" taken out bye Eric F. Burtis of Atherton, California and Ming T. Lien of San Diego, California. It was assigned to Eric F. Burtis of Menlo Park, California. The patent was filed December 27, 1976 and granted May 14, 1978; it has number 4,089,124. This is the patent for a device that sold as the digitor.
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: 1986.3081.12
label: catalog number
content: 1986.3081.12
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