Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8361181 | Air cleaner assemblies; filter cartridges therefor; features; and, methods | Richard Osendorf, Andrew Albitz, Bradley Keumpel | 2013-01-29 |
| D666704 | Filter cartridge | Richard Osendorf, Andrew Albitz, Bradley Kuempel | 2012-09-04 |
| D646368 | Filter cartridge | Richard Osendorf, Andrew Albitz, Bradley Kuempel | 2011-10-04 |
| 7455707 | Reverse flow air filter arrangement and method | Don Harold, John R. Hacker, Bruce Crenshaw, Donald F. Engel | 2008-11-25 |
| 6521009 | Reverse flow air filter arrangement and method | Donald F. Engel, John R. Hacker, Bruce Crenshaw, Don Harold | 2003-02-18 |
| 6413289 | Reverse flow air filter arrangement | Donald F. Engel, John R. Hacker, Bruce Crenshaw, Don Harold | 2002-07-02 |
| 6322602 | Reverse flow air filter arrangement | Donald F. Engel, John R. Hacker, Bruce Crenshaw, Don Harold | 2001-11-27 |
| 6258145 | Reverse flow air filter arrangement | Donald F. Engel, John R. Hacker, Bruce Crenshaw, Don Harold | 2001-07-10 |
| 6099606 | Air filtration arrangements having spacer constructions | Thomas Miller, Andrew Albitz, Bruce Crenshaw | 2000-08-08 |
| D425977 | Inside surface of a filter element having insert construction | Donald F. Engel, John R. Hacker, Bruce Crenshaw, Don Harold | 2000-05-30 |
| D422071 | Inside surface of a filter element having spacer construction | Thomas Miller, Andrew Albitz, Bruce Crenshaw | 2000-03-28 |
| 6004366 | Reverse flow air filter arrangement and method | Donald F. Engel, John R. Hacker, Bruce Crenshaw, Don Harold | 1999-12-21 |
| 5954849 | Filter element | James L. Berkhoel, Michael S. Bergeson | 1999-09-21 |
| 5938804 | Reverse flow air filter arrangement and method | Donald F. Engel, John R. Hacker, Bruce Crenshaw, Don Harold, by Shirley A. Harold, legal representative | 1999-08-17 |
| 5897676 | Reverse flow air filter arrangement and method | Donald F. Engel, John R. Hacker, Bruce Crenshaw, Don Harold | 1999-04-27 |
| 5803941 | Filter element | James L. Berkhoel, Michael S. Bergeson, Bruce Johnson, Steven D. Schmeichel | 1998-09-08 |