USD304854SExpiredUtility

Portable air filter

75
Assignee: STACKHOUSE ASSPriority: Apr 27, 1988Filed: Apr 27, 1988Granted: Nov 28, 1989
Est. expiryApr 27, 2008(expired)· nominal 20-yr term from priority
Inventors:Wyman H. StackhouseIan M. Williamson
75
PatentIndex Score
17
Cited by
5
References
1
Claims

Claims

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

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