Key telephone system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 9, 1993
Grant Date -
N/A
app pub date -
Nov 30, 1989
filing date -
Dec 1, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A key telephone system is provided with a main equipment including at least two extensions and at least one line wire which accommodates a digital line. The key telephone system is arranged to enable reciprocal data communications by effecting speed matching in data communications between a data terminal connected to the extension and the digital line accommodated in the line wire.
First Claim
Family
International Classification(s)
Cited Art Landscape
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