Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Marker buoy

Marker buoy

US Patent 5141458 · Granted Aug 25, 1992

Assignee

No assignee recorded.

Inventors

John D. Church (7 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Animal leash2015

Animal leash2015

Vehicle equipment rack2004

Lifting monitoring and exercise training system1995

Microprocessor controlled system for unsupervised EMG feedback and exercise trai1994

Diver's bag1983

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly