Air filter
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The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application with color drawings will be provided by the United States Patent and Trademark Office upon request and payment of the necessary fee.
The claimed area of the air filter of
The portions in the drawing views shown in broken lines form no part of the claimed design.
Claims
The ornamental design for an air filter, as shown and described.
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- Trademark Application Serial No. 86-935,298, filed Mar. 10, 2016.
- Trademark Application Serial No. 86-912,631, filed Feb. 18, 2016.
Type: Grant
Filed: Jun 20, 2016
Date of Patent: Feb 18, 2020
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Glen O. Gregerson (Hudson, WI), Jonathan M. Lise (Woodbury, MN)
Primary Examiner: Karen E Kearney
Assistant Examiner: John A Voytek
Application Number: 29/568,568