USD491655SExpiredUtility

Air cleaner

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Assignee: 3M INNOVATIVE PROPERTIES COPriority: Aug 5, 2003Filed: Aug 5, 2003Granted: Jun 15, 2004
Est. expiryAug 5, 2023(expired)· nominal 20-yr term from priority
Inventors:Zhiqun ZhangRobert M. Swinehart
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PatentIndex Score
2
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9
References
1
Claims

Claims

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

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