USD271338SExpiredUtility
Portable air filtration unit
Individually held — no corporate assignee on recordPriority: Sep 16, 1980Filed: Mar 16, 1981Granted: Nov 8, 1983
Est. expirySep 16, 2000(expired)· nominal 20-yr term from priority
Inventors:Hubert G. Dukowski
40
PatentIndex Score
5
Cited by
3
References
1
Claims
Claims
exact text as granted — not AI-modifiedThe ornamental design for a portable air filtration unit, as shown and described.
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