USD538852SExpiredUtility
Ball-marker pen
Est. expiryAug 9, 2025(expired)· nominal 20-yr term from priority
Inventors:Wei-Chin Chen
42
PatentIndex Score
6
Cited by
7
References
1
Claims
Claims
exact text as granted — not AI-modifiedCLAIM
The ornamental design for “ball-marker pen,” as shown and described.Join the waitlist — get patent alerts
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