Filter device

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Description

FIG. 1 is a perspective view.

FIG. 2 is a left-hand side view.

FIG. 3 is a top view.

FIG. 4 is a bottom view.

FIG. 5 is a right-hand side view.

FIG. 6 is a front view; and,

FIG. 7 is a back view.

Claims

The ornamental design for a filter device, as shown.

Referenced Cited
U.S. Patent Documents
D561299 February 5, 2008 Baba
D561300 February 5, 2008 Baba
D594927 June 23, 2009 Amtmann
8177073 May 15, 2012 Kuo
Foreign Patent Documents
986352 April 1997 CN
Patent History
Patent number: D668740
Type: Grant
Filed: Oct 20, 2011
Date of Patent: Oct 9, 2012
Assignee: DWT Deutsche Wassertechnologien GmbH (Frankfurt am Main)
Inventors: Vladimir Mikhailovich Kulikov (Moscow), Vladimir Alekseevich Zakharov (Moscow)
Primary Examiner: Robin V Webster
Attorney: Bachmna & LaPointe, P.C.
Application Number: 29/404,377
Classifications
Current U.S. Class: Filter Or Strainer (2) (D23/209)