USD421786SExpiredUtility
Area filter device
Individually held — no corporate assignee on recordPriority: Sep 10, 1998Filed: Sep 10, 1998Granted: Mar 21, 2000
Est. expirySep 10, 2018(expired)· nominal 20-yr term from priority
Inventors:Raoul L. Madrid
13
PatentIndex Score
2
Cited by
4
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for an area filter device, as shown and described.
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