USD311270SExpiredUtility

Air filtration unit

68
Assignee: CRYSTAL CLEAR AIR INCPriority: Sep 10, 1987Filed: Sep 10, 1987Granted: Oct 16, 1990
Est. expirySep 10, 2007(expired)· nominal 20-yr term from priority
Inventors:James J. SavageJames Andrew Walsh
68
PatentIndex Score
17
Cited by
21
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for an air filtration unit, as shown.

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