Patent Leaderboard

USPTO Patent Rankings Data through Dec 31, 2025

Search Companies Inventors Cities States

Home › Pressurized pen

Pressurized pen

US Patent 7819601 · Granted Oct 26, 2010

Assignee

Tombow Pencil Co.

Inventors

Shunichi Taniguchi (4 patents)

View full patent text on Google Patents →

More Patents by These Inventors

Pressurized pen2009

Multicolored ballpoint pen2009

Data from USPTO via PatentsView — © 2026 Patent Leaderboard

Last updated: Dec 31, 2025 · Updated quarterly