|
| US4179883 | 14 Mar 1977 | 25 Dec 1979 | Nippon Oil Seal Industry Co., Ltd. | Reed valve assembly |
| US4386949 | 2 Oct 1981 | 7 Jun 1983 | ITW Fastex Italia S.p.A. | Connector for an air filter assembly |
| US4640698 | 7 May 1985 | 3 Feb 1987 | Honda Giken Kogyo Kabushiki Kaisha | Air cleaner device |
| US5195484 | 24 Oct 1991 | 23 Mar 1993 | General Motors Corporation | Air cleaner and snorkel assembly |
| US5720790 | 24 Dec 1996 | 24 Feb 1998 | Denso Corporation Toyoda Boshoku Corporation | Filter element |
| US6652614 | 4 Dec 2000 | 25 Nov 2003 | Donaldson Company, Inc. | Filter system; element configuration; and methods |
| US6837920 | 24 Nov 2003 | 4 Jan 2005 | Donaldson Company, Inc. | Filter system; element configuration; and methods |
| US6986805 | 7 Sep 2004 | 17 Jan 2006 | Donaldson Company, Inc. | Filter system; element configuration; and methods |
| US7070642 | 23 Oct 2003 | 4 Jul 2006 | Donaldson Company, Inc. | Air cleaner; replaceable filter cartridges; and, methods |
| US7291198 | 11 Jan 2006 | 6 Nov 2007 | Donaldson Company, Inc. | Filter system; element configuration; and methods |
| US7455707 | 10 Feb 2003 | 25 Nov 2008 | Donaldson Company, Inc. | Reverse flow air filter arrangement and method |
| US7537631 | 24 Aug 2005 | 26 May 2009 | Donaldson Company, Inc. | Filter cartridges; air cleaners; and methods |
| US7572310 | 5 Nov 2007 | 11 Aug 2009 | Donaldson Company, Inc. | Filter system; element configuration; and methods |
| US7662203 | 6 Jun 2006 | 16 Feb 2010 | Donaldson Company, Inc. | Air cleaner; replaceable filter cartridges; and, methods |
| US7981187 | 30 Jun 2009 | 19 Jul 2011 | Donaldson Company, Inc. | Filter system; element configuration; and methods |
| US7988757 | 15 Jan 2010 | 2 Aug 2011 | Donaldson Company, Inc. | Air cleaner; replaceable filter cartridges; and, methods |
| US8038756 | 17 Jul 2008 | 18 Oct 2011 | Donaldson Company, Inc. | Air cleaner arrangements; components; and, methods |
| US8066791 | 16 Jul 2008 | 29 Nov 2011 | Donaldson Company, Inc. | Air cleaner arrangements with internal and external support for cartridge; components; and, methods |
| US8163056 | 15 Aug 2006 | 24 Apr 2012 | Donaldson Company, Inc. | Air cleaner having anti-rotational arrangement and methods |
| US8216333 | 15 Apr 2009 | 10 Jul 2012 | Briggs & Stratton Corporation | Air cleaner assembly for small engine |
| US8216335 | 24 Aug 2005 | 10 Jul 2012 | Donaldson Company, Inc. | Air cleaner; replaceable filter cartridges; and methods |
| USD656160 | 15 Apr 2009 | 20 Mar 2012 | Briggs & Stratton Corporation | Air filter |