{"@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [{"@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.patentleaderboard.com/"}, {"@type": "ListItem", "position": 2, "name": "Envelope opener", "item": "https://www.patentleaderboard.com/patent/D329183"}]}
Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Envelope opener

US Patent D329183 · Granted Sep 8, 1992

Assignee

Inventors

View full patent text on Google Patents →