Hand held type electronic calculators
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jan 19, 1982
Issued Date -
N/A
app pub date -
Feb 26, 1976
filing date -
Aug 10, 1972
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a hand held type electronic calculator wherein a display section and a key board are mounted on the surface of an insulative substrate, a driving circuit for driving the display section and an operation circuit operated by the key board are also mounted on the same surface of the insulative substrate.
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