Air filter

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

FIG. 1 is a perspective view of an air filter in the present design;

FIG. 2 is a front view of an air filter in the present design;(a rear view being the same),

FIG. 3 is a left view of an air filter in the present design;(a right view being the same);

FIG. 4 is a top view of an air filter in the present design; and,

FIG. 5 is a bottom view of an air filter in the present design.

Patent	Priority	Assignee	Title
D510991,	Jan 16 2004	RECKITT BENCKISER UK LIMITED	Air freshener device
D522118,	Jun 16 2003	The Procter & Gamble Company	Perfume burner
D522642,	Sep 30 2004	Earth Chemical Co., Ltd.	Air freshener
D543265,	Apr 12 2005	MTE Pte Ltd	Air purifier with illuminating base
D617439,	Dec 23 2009	BATH & BODY WORKS BRAND MANAGEMENT, INC	Air freshener device
D669232,	Dec 13 2011	Sunbeam Products, Inc.	Bark collar housing
D685900,	Nov 27 2012	BIO-LAB, INC	Dispensing device
D742224,	Jul 19 2013	S C JOHNSON & SON, INC	Container
D810909,	Aug 05 2016	SHENZHEN SHENGRONGFENGHE TRADE CO , LTD	Aromatherapy diffuser in the shape of a bamboo shoot

Patent	Priority	Assignee	Title
5685887,	Jun 20 1995	Going Tokyo, Co, Ltd.	Filter element
D274837,	Jul 24 1980	VAPORTEK, INC , A CORP OF WI	Air purifier
D342990,	Dec 13 1991	Visteon Global Technologies, Inc	Air filter element
D386255,	Apr 01 1996	Super Fodak Int'l Ent. Co. Ltd.	Air purifier with illuminating outer ring
D401684,	Nov 12 1997	ANTARES CAPITAL LP, AS AGENT	Air Filter

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