USD474836SExpiredUtility

Air filter

59
Priority: Jul 30, 2002Filed: Jul 30, 2002Granted: May 20, 2003
Est. expiryJul 30, 2022(expired)· nominal 20-yr term from priority
Inventors:Yung-Yu Chang
59
PatentIndex Score
11
Cited by
6
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for an air filter, as shown.

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