USD392031SExpiredUtility

Air duct filter apparatus

64
Individually held — no corporate assignee on recordPriority: Jan 17, 1997Filed: Jan 17, 1997Granted: Mar 10, 1998
Est. expiryJan 17, 2017(expired)· nominal 20-yr term from priority
Inventors:Wendy B. Miller
64
PatentIndex Score
22
Cited by
3
References
1
Claims

Claims

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

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