USD521620SExpiredUtility

Air purifier

78
Assignee: A I AIR TECHNOLOGY INCPriority: Dec 27, 2004Filed: Dec 27, 2004Granted: May 23, 2006
Est. expiryDec 27, 2024(expired)· nominal 20-yr term from priority
Inventors:Dan TsengDavid N. KayeLiu Sheng
78
PatentIndex Score
30
Cited by
3
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for air purifier, as shown and described.

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