Automatically switching dual air filter

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Description

FIG. 1 is a perspective view of the automatically switching dual air filter showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevation view thereof; and,

FIG. 7 is a right side elevation view thereof.

Portions of the article shown in broken lines form no part of the claimed design.

Claims

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

Referenced Cited
U.S. Patent Documents
D281618 December 3, 1985 Grube
D365389 December 19, 1995 Williams
D375546 November 12, 1996 Lee
D398975 September 29, 1998 Nystrom
5800581 September 1, 1998 Gielink
6039778 March 21, 2000 Coulonvaux
D423659 April 25, 2000 Schippanoski
D438214 February 27, 2001 Gieseke
D471623 March 11, 2003 Gieseke
D499177 November 30, 2004 Kosmider
D501248 January 25, 2005 Chi-Hsiang
6955701 October 18, 2005 Schrage
D516687 March 7, 2006 Shapiro
D716427 October 28, 2014 Lim
Patent History
Patent number: D820963
Type: Grant
Filed: Apr 20, 2016
Date of Patent: Jun 19, 2018
Inventor: Abraham Wipf (Mitchell, SD)
Primary Examiner: Sheryl Lane
Assistant Examiner: Samantha N Wood
Application Number: 29/561,832
Classifications
Current U.S. Class: Filter (D23/365)