Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method of indicating a portable unit of a cordless telephone instrument out of operational area and its device

Method of indicating a portable unit of a cordless telephone instrument out of operational area and its device

US Patent 5644620 · Granted Jul 1, 1997

Estimated economic value: $23,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Radio phone apparatus having compact cordless extension unit1998
Cordless key telephone system with multiple tenant facility1994
Cordless key telephone system for covering multiple service areas having exclusi1994
Radio communication system having control method for shortening call response ti1992
Method for controlling a plurality of stationary apparatuses in a cordless telep1992
Interconnection control method in cordless telephone system1991
Radio telephone1990
Registration of a new cordless telephone to an existing system1989
Rapid processing of immediately successive arrival signals in a base station of 1989
Base station capable of monitoring occurrence of interference on every transmiss1989