First dialed digit detector and comparator
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United States of America Patent
Stats
-
Dec 13, 1988
Issued Date -
N/A
app pub date -
Dec 30, 1987
filing date -
Mar 14, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for use in a telephone detects the first dialed digit and compares it with a reference value stored in a memory to determine the type of a telephone call.
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Cited Art Landscape
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