USD431647SExpiredUtility

Personal respiratory protection device having an exhalation valve

Assignee: 3M INNOVATIVE PROPERTIES COPriority: Sep 6, 1996Filed: Sep 6, 1996Granted: Oct 3, 2000

Est. expirySep 6, 2016(expired)· nominal 20-yr term from priority

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exact text as granted — not AI-modified

The ornamental design for a personal respiratory protection device having an exhalation valve, as shown and described.

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