USD454949SExpiredUtility

Coupling ring for ventilation ducts

87
Assignee: LINDAB ABPriority: Jan 17, 2001Filed: Jan 17, 2001Granted: Mar 26, 2002
Est. expiryJan 17, 2021(expired)· nominal 20-yr term from priority
Inventors:Lars-Åke MattssonKenneth LennartssonSten HögmanCarl-Gustaf Sonden
87
PatentIndex Score
36
Cited by
7
References
1
Claims

Claims

exact text as granted — not AI-modified
The ornamental design for a coupling ring for ventilation ducts, as shown.

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