USD427286SExpiredUtility

Air admittance valve

Assignee: BALLANCO JULIUSPriority: May 25, 1999Filed: May 25, 1999Granted: Jun 27, 2000

Est. expiryMay 25, 2019(expired)· nominal 20-yr term from priority

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Claims

exact text as granted — not AI-modified

The ornamental design for an air admittance valve, as shown and described.

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