Air filter

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Description

FIG. 1 is a perspective view showing the new design for an air filter;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a side view thereof.

The features shown in broken lines depict environmental structure only and form no part of the claimed design.

Claims

The ornamental design for an air filter, as shown and described.

Referenced Cited
U.S. Patent Documents
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4372763 February 8, 1983 Champlin
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5342423 August 30, 1994 Taft
5525145 June 11, 1996 Hodge
5704953 January 6, 1998 Stemmer
5800588 September 1, 1998 Miller
5810898 September 22, 1998 Miller
D402356 December 8, 1998 Hodge
6033454 March 7, 2000 Hoeffken
6209724 April 3, 2001 Miller
D449098 October 9, 2001 Reede
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6464745 October 15, 2002 Rivera et al.
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D548826 August 14, 2007 Katta
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8197571 June 12, 2012 Porter
8353975 January 15, 2013 Bruck et al.
20090301044 December 10, 2009 Miller
Patent History
Patent number: D705411
Type: Grant
Filed: Jun 7, 2012
Date of Patent: May 20, 2014
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Christopher K. Enstrom (Eagan, MN), Dennis M. Glass (Cottage Grove, MN), Jonathan M. Lise (Woodbury, MN), Stephen M. Sanocki (Hudson, WI)
Primary Examiner: David Muller
Application Number: 29/424,105
Classifications
Current U.S. Class: Filter (D23/365)