List of automotive air filter patents

Patent 7533661 was granted and assigned to Holley Performance Products on May, 2009 by the United States Patent and Trademark Office.

Patent 11459982 was granted and assigned to K&N Engineering on October, 2022 by the United States Patent and Trademark Office.

Patent 8673196 was granted and assigned to FRAM (Company) on March, 2014 by the United States Patent and Trademark Office.

Patent 11351495 was granted and assigned to K&N Engineering on June, 2022 by the United States Patent and Trademark Office.

Patent 11548394 was granted and assigned to K&N Engineering on January, 2023 by the United States Patent and Trademark Office.

Patent 11478739 was granted and assigned to K&N Engineering on October, 2022 by the United States Patent and Trademark Office.

Patent 9701178 was granted and assigned to K&N Engineering on July, 2017 by the United States Patent and Trademark Office.

Patent 10012197 was granted and assigned to Holley Performance Products on July, 2018 by the United States Patent and Trademark Office.

Patent 10434466 was granted and assigned to K&N Engineering on October, 2019 by the United States Patent and Trademark Office.

Patent 11649776 was granted and assigned to K&N Engineering on May, 2023 by the United States Patent and Trademark Office.

Patent 11281960 was granted and assigned to K&N Engineering on March, 2022 by the United States Patent and Trademark Office.

Patent 11241647 was granted and assigned to K&N Engineering on February, 2022 by the United States Patent and Trademark Office.

Patent 11306691 was granted and assigned to K&N Engineering on April, 2022 by the United States Patent and Trademark Office.

Patent 6837228 was granted and assigned to Holley Performance Products on January, 2005 by the United States Patent and Trademark Office.

Patent 10512872 was granted and assigned to K&N Engineering on December, 2019 by the United States Patent and Trademark Office.

Patent 11536231 was granted and assigned to K&N Engineering on December, 2022 by the United States Patent and Trademark Office.

Patent 11549469 was granted and assigned to K&N Engineering on January, 2023 by the United States Patent and Trademark Office.

Patent 7452395 was granted and assigned to K&N Engineering on November, 2008 by the United States Patent and Trademark Office.

Patent 11565584 was granted and assigned to K&N Engineering on January, 2023 by the United States Patent and Trademark Office.

Patent 10316805 was granted and assigned to K&N Engineering on June, 2019 by the United States Patent and Trademark Office.

Patent 11524255 was granted and assigned to Cummins Filtration on December, 2022 by the United States Patent and Trademark Office.