USD254804SExpiredUtility

Roof vent

53
Assignee: BALLARD JAMES WPriority: Dec 11, 1978Filed: Dec 11, 1978Granted: Apr 22, 1980
Est. expiryDec 11, 1998(expired)· nominal 20-yr term from priority
Inventors:James W. BallardLarry R. Ballard
53
PatentIndex Score
5
Cited by
6
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a roof vent, as shown.

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