USD542621SExpiredUtility

Door lock and operation mechanism

25
Assignee: DENG SHENG BILLPriority: Oct 27, 2004Filed: Oct 27, 2004Granted: May 15, 2007
Est. expiryOct 27, 2024(expired)· nominal 20-yr term from priority
Inventors:Sheng Bill DengSheng Deng
25
PatentIndex Score
1
Cited by
12
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       We claim the ornamental design for a door lock and operation mechanism, as shown and described.

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