Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Security closure

Security closure

US Patent 4384428 · Granted May 24, 1983

Assignee

Unknown

Inventors

Roy L. Cox (5 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Copper free friction material composition2016

Theft deterent lock1982

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly