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Respirator mask having a communication grille

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Assignee: 3M INNOVATIVE PROPERTIES COPriority: May 22, 2014Filed: May 22, 2014Granted: Dec 29, 2015
Est. expiryMay 22, 2034(~7.9 yrs left)· nominal 20-yr term from priority
Inventors:David M. BlombergGary E. DwyerCarl W. Raines, IiiMark W. Schulz
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PatentIndex Score
11
Cited by
101
References
1
Claims

Claims

exact text as granted — not AI-modified
CLAIM 
     
       The ornamental design for a respirator mask having a communication grille, as shown and described.

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