Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8241383 | Z-filter media pack arrangement; and, methods | Kevin Schrage, Eugene Lensing, Jeff Rahlf, Wayne R. W. Bishop, Gregory Reichter +3 more | 2012-08-14 |
| 7967886 | Z-filter media pack arrangement; and, methods | Kevin Schrage, Eugene Lensing, Jeff Rahlf, Wayne R. W. Bishop, Gregory Reichter +3 more | 2011-06-28 |
| 7455707 | Reverse flow air filter arrangement and method | Don Harold, Dolan Bartels, John R. Hacker, Donald F. Engel | 2008-11-25 |
| 6521009 | Reverse flow air filter arrangement and method | Donald F. Engel, Dolan Bartels, John R. Hacker, Don Harold | 2003-02-18 |
| 6413289 | Reverse flow air filter arrangement | Donald F. Engel, Dolan Bartels, John R. Hacker, Don Harold | 2002-07-02 |
| 6322602 | Reverse flow air filter arrangement | Donald F. Engel, Dolan Bartels, John R. Hacker, Don Harold | 2001-11-27 |
| 6258145 | Reverse flow air filter arrangement | Donald F. Engel, Dolan Bartels, John R. Hacker, Don Harold | 2001-07-10 |
| 6099606 | Air filtration arrangements having spacer constructions | Thomas Miller, Dolan Bartels, Andrew Albitz | 2000-08-08 |
| D425977 | Inside surface of a filter element having insert construction | Donald F. Engel, Dolan Bartels, John R. Hacker, Don Harold | 2000-05-30 |
| D422071 | Inside surface of a filter element having spacer construction | Thomas Miller, Dolan Bartels, Andrew Albitz | 2000-03-28 |
| 6004366 | Reverse flow air filter arrangement and method | Donald F. Engel, Dolan Bartels, John R. Hacker, Don Harold | 1999-12-21 |
| 5938804 | Reverse flow air filter arrangement and method | Donald F. Engel, Dolan Bartels, John R. Hacker, Don Harold, by Shirley A. Harold, legal representative | 1999-08-17 |
| 5897676 | Reverse flow air filter arrangement and method | Donald F. Engel, Dolan Bartels, John R. Hacker, Don Harold | 1999-04-27 |