USD745602SActiveUtility

Ring binder mechanism having a convex central rib

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Assignee: Qiu jian yongPriority: Dec 12, 2011Filed: Jun 12, 2012Granted: Dec 15, 2015
Est. expiryDec 12, 2031(~5.4 yrs left)· nominal 20-yr term from priority
Inventors:Jian Qiu
20
PatentIndex Score
1
Cited by
31
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a ring binder mechanism having a convex central rib, as shown and described.

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