Respirator mask having a circular button

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Description

FIG. 1 is a perspective view showing the new design for a respirator mask having a circular button;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a right side view thereof, the left side being a mirror image thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The broken lines in the drawings illustrate portions of the respirator mask having a circular button which form no part of the claimed design.

Claims

The ornamental design for a respirator mask having a circular button, as shown and described.

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Patent History
Patent number: D743536
Type: Grant
Filed: Feb 27, 2015
Date of Patent: Nov 17, 2015
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: David M. Blomberg (Lino Lakes, MN), William A. Mittelstadt (Woodbury, MN)
Primary Examiner: Deanna L Pratt
Assistant Examiner: Lilyana Bekic
Application Number: 29/518,793
Classifications
Current U.S. Class: Mask (D24/110.1)