USD261925SExpiredUtility

Over-pressure valve for ventilation

28
Assignee: KOLSTER AB OYPriority: Mar 27, 1979Filed: Sep 21, 1979Granted: Nov 17, 1981
Est. expiryMar 27, 1999(expired)· nominal 20-yr term from priority
Inventors:Launo Laakkonen
28
PatentIndex Score
3
Cited by
7
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for an over-pressure valve for ventilation, as shown and described.

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