Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Writing instrument

Writing instrument

US Patent 6899482 · Granted May 31, 2005

Assignee

Tombow Pencil Co.

Inventors

Kazunori Katami (47 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Correction tape dispenser2020

Correction tape dispenser2020

Multicolored ballpoint pen2009

Knock type eraser2009

Knock type eraser2008

Ball point pen2006

Ball point pen2006

Ball point pen2004

Ball point pen2004

Ball point pen2004

Ball point pen2004

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly