Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Telephone ringer

Telephone ringer

US Patent 4823379 · Granted Apr 18, 1989

Assignee

Alcatel Business Systems

Inventors

Jerry D. Palmer (5 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Pond water destratifier1993

Pond water destratifier1992

Volume control device for ringer1987

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly