USD741475SActiveUtility

Respirator mask having a communication grille

37
Assignee: 3M INNOVATIVE PROPERTIES COPriority: Feb 27, 2015Filed: Feb 27, 2015Granted: Oct 20, 2015
Est. expiryFeb 27, 2035(~8.6 yrs left)· nominal 20-yr term from priority
Inventors:David M. BlombergMark W. SchulzCharlie Wood
37
PatentIndex Score
2
Cited by
126
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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