Issued Patents All Time
Showing 51–73 of 73 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D646350 | Filter | Christopher J. Salvador, Randall W. Heibenthal, Dennis M. Deedrich, David B. Harder, Richard J. Eisenmenger | 2011-10-04 |
| 7955502 | Liquid filter arrangement and methods | Enrico Greco, Fabrizio Buratto, Mauro Cantoni, Christian Guernieri, John F. Connelly | 2011-06-07 |
| 7886610 | Differential pressure gauge for filter | Michael J. Gustafson | 2011-02-15 |
| 7662284 | Liquid filter arrangement and methods | Enrico Greco, Fabrizio Buratto, Mauro Cantoni, Christian Guernieri, John F. Connelly | 2010-02-16 |
| 7628280 | Liquid filter arrangement; components; and methods | Brian Mandt, Brent A. Gulsvig | 2009-12-08 |
| 7556155 | Fluid filter and methods | David B. Harder, Philip Edward Johnson, Eivind Stenersen, Curt A. Rausch | 2009-07-07 |
| 7455707 | Reverse flow air filter arrangement and method | Don Harold, Dolan Bartels, Bruce Crenshaw, Donald F. Engel | 2008-11-25 |
| 7314555 | Filter cartridge for a filter assembly | Stan M. Koehler, Brent A. Gulsvig | 2008-01-01 |
| 7238285 | Liquid filter assembly for use with treatment agent; and, methods | Brian Mandt, Brent A. Gulsvig | 2007-07-03 |
| 7225680 | Differential pressure gauge for filter | Michael J. Gustafson, John F. Connelly, Gus E. Breiland | 2007-06-05 |
| 7160451 | Liquid filter assembly for use with treatment agent and methods | Brian Mandt, Brent A. Gulsvig | 2007-01-09 |
| 6521009 | Reverse flow air filter arrangement and method | Donald F. Engel, Dolan Bartels, Bruce Crenshaw, Don Harold | 2003-02-18 |
| 6413289 | Reverse flow air filter arrangement | Donald F. Engel, Dolan Bartels, Bruce Crenshaw, Don Harold | 2002-07-02 |
| 6384369 | Liquid filter construction and methods | Eivind Stenersen, David B. Harder, Gerald D. Kiral, Ronald W. Streitmatter, Kevin K. Socha | 2002-05-07 |
| 6322602 | Reverse flow air filter arrangement | Donald F. Engel, Dolan Bartels, Bruce Crenshaw, Don Harold | 2001-11-27 |
| 6322697 | Oil filter assembly | Michael J. Gustafson | 2001-11-27 |
| 6258145 | Reverse flow air filter arrangement | Donald F. Engel, Dolan Bartels, Bruce Crenshaw, Don Harold | 2001-07-10 |
| D425977 | Inside surface of a filter element having insert construction | Donald F. Engel, Dolan Bartels, Bruce Crenshaw, Don Harold | 2000-05-30 |
| 6004366 | Reverse flow air filter arrangement and method | Donald F. Engel, Dolan Bartels, Bruce Crenshaw, Don Harold | 1999-12-21 |
| 5938804 | Reverse flow air filter arrangement and method | Donald F. Engel, Dolan Bartels, Bruce Crenshaw, Don Harold, by Shirley A. Harold, legal representative | 1999-08-17 |
| 5897676 | Reverse flow air filter arrangement and method | Donald F. Engel, Dolan Bartels, Bruce Crenshaw, Don Harold | 1999-04-27 |
| 5177888 | Discharge chute assembly for snowthrower | Richard A. Thorud, Thomas K. Bricko, David E. Larsen, Dean R. Toensing, Donald M. White, III | 1993-01-12 |
| 4550919 | Seal for a power fed roller | Mark Snetting, Dan West | 1985-11-05 |