USD521190SExpiredUtility

Welding helmet

92
Assignee: CENTRAL PURCHASING LLCPriority: Dec 21, 2004Filed: Dec 21, 2004Granted: May 16, 2006
Est. expiryDec 21, 2024(expired)· nominal 20-yr term from priority
Inventors:Ziqian Wu
92
PatentIndex Score
51
Cited by
12
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a welding helmet, as shown and described.

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