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 even length dash lines depict portions of the air filter that form no part of the claimed design. The long-short dash lines illustrate the bounds of the magnified portion and 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: Jan 29, 2020
Date of Patent: Sep 5, 2023
Assignee: 3M Innovative Properties Company (St. Paul, MN)
Inventors: Glen O. Gregerson (Hudson, WI), Jonathan M. Lise (Woodbury, MN)
Primary Examiner: Mehri F Bajoul
Application Number: 29/722,405