Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Writing ball, method for manufacturing writing ball, and ballpoint pen with writing ball

Writing ball, method for manufacturing writing ball, and ballpoint pen with writing ball

US Patent 12220937 · Granted Feb 11, 2025

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Oil-based ball-point pen refill, oil-based ball-point pen, and oil-based ball-po2018
Ballpoint pen tip and ballpoint pen using the same2016
Ballpoint pen tip and ballpoint pen2013