Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Ringer system for a telephone

Ringer system for a telephone

US Patent 4374307 · Granted Feb 15, 1983

Estimated economic value: $52,335,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Universal remote control including quick touch function1993
Subwoofer speaker system1992
Reconfigurable remote control transmitter1989
Power supply with current limiting1980