Sharp EL104 Handheld Electronic Calculator

Description
This handheld electronic calculator has a black and white plastic case and an array of twenty rounded rectangular plastic keys. These include ten digit keys, a decimal point key, a % key, four arithmetic function keys, a clear key, a clear entry key, a square root key, and a total key. Behind the keyboard is an eight-digit purple LED display that seems to have a ninth character space. The on/off switch is behind the display on the right. A tag left of this reads: SHARP ELSI MATE (/) EL-104.
At the top of the back is a compartment for a nine-volt battery. Text below this reads: ELECTRONIC CALCULATOR (/) EL-104. Further text reads: SHARP CORPORATION (/) MADE IN JAPAN BM. A paper sticker below the mark gives a list of U.S., Canadian, Swedish and Australian patents protecting the device. The latest American patent is 3621219, issued in 1971 and initially assigned to Hayakawa.
The calculator has a leather or imitation leather carrying case with a metal snap and plastic edging. This case also has a hook so that it could be worn over a belt.
Compare 1986.0988.133 (Sharp Elsimate EL-206).
References:
The online MyCalc database dates this calculator to about 1976. The online Calculator.org database dates it to 1976. No advertisements found.
Location
Currently not on view
date made
1976
maker
Sharp Corporation
place made
Japan
Physical Description
plastic (case; keys; carrying case; display cover material)
metal (circuitry; carrying case snap material)
paper (sticker material)
Measurements
overall: 7/8 in x 3 in x 4 1/2 in; 2.2225 cm x 7.62 cm x 11.43 cm
ID Number
1986.0988.315
catalog number
1986.0988.315
accession number
1986.0988
Credit Line
Gift of John B. Priser
See more items in
Medicine and Science: Computers
Handheld Electronic Calculators
Computers & Business Machines
Data Source
National Museum of American History, Kenneth E. Behring Center

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