Air filter
Latest 3M Innovative Properties Company Patents:
Description
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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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
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)