USD439646SExpiredUtility

Air filter cleaning device

33
Priority: May 17, 2000Filed: May 17, 2000Granted: Mar 27, 2001
Est. expiryMay 17, 2020(expired)· nominal 20-yr term from priority
Inventors:Michael Mcmahon
33
PatentIndex Score
2
Cited by
3
References
1
Claims

Claims

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

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