USD428325SExpiredUtility

Fire preventing duct for passing cables and pipes through walls and bulkheads

66
Assignee: VAN DREUMEL ANDREPriority: Mar 10, 1998Filed: Sep 9, 1998Granted: Jul 18, 2000
Est. expiryMar 10, 2018(expired)· nominal 20-yr term from priority
Inventors:Andre Van DreumelDagfinn Nilsen
66
PatentIndex Score
22
Cited by
5
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a fire preventing duct for passing cables and pipes through walls and bulkheads, as shown and described.

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