USD556138SExpiredUtility

Changeable plugs system

63
Assignee: HELMS MAN IND CO LTDPriority: Sep 12, 2003Filed: Dec 4, 2006Granted: Nov 27, 2007
Est. expirySep 12, 2023(expired)· nominal 20-yr term from priority
Inventors:Yuk Hung Ng
63
PatentIndex Score
13
Cited by
27
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a changeable plugs system, as shown.

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