USD447223SExpiredUtility

Sealing rings for ventilation ducts

Assignee: LINDAB ABPriority: Nov 6, 1998Filed: May 5, 1999Granted: Aug 28, 2001

Est. expiryNov 6, 2018(expired)· nominal 20-yr term from priority

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exact text as granted — not AI-modified

The ornamental design for sealing rings for ventilation ducts, as shown.

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