USD249897SExpiredUtility

Air stone

65
Assignee: WILLINGER BROSPriority: Jul 15, 1977Filed: Jul 15, 1977Granted: Oct 10, 1978
Est. expiryJul 15, 1997(expired)· nominal 20-yr term from priority
Inventors:Allan H. Willinger
65
PatentIndex Score
7
Cited by
3
References
1
Claims

Claims

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

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