Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Envelope opener

Envelope opener

US Patent D306394 · Granted Mar 6, 1990

Assignee

Quick Point

Inventors

Neil E. Koenig (3 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Sharps disposal2003

Multi-use pet environment2003

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly