Triangular bond pattern on a personal respiratory protection mask
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The phantom line showing forms no part of the claimed design, the dot-dash line meeting the solid lines shows the boundary of the claimed design, and the shading is provided to illustrate contour only and is not an indication of texture, gloss, etc.
Claims
The ornamental design for a triangular bond pattern on a personal respiratory protection mask, as shown and described.
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Type: Grant
Filed: Sep 18, 2009
Date of Patent: May 15, 2012
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Scott A. Spoo (Deer Park, WI), Dean R. Duffy (Woodbury, MN)
Primary Examiner: Wan Laymon
Attorney: Karl G. Hanson
Application Number: 29/343,750