DE

Donald F. Engel

DC Donaldson Company: 36 patents #23 of 695Top 4%
📍 Prior Lake, MN: #14 of 425 inventorsTop 4%
🗺 Minnesota: #1,515 of 52,454 inventorsTop 3%
Overall (All Time): #93,547 of 4,157,543Top 3%
36
Patents All Time

Issued Patents All Time

Showing 1–25 of 36 patents

Patent #TitleCo-InventorsDate
11679352 Filter arrangements; housings; assemblies; and, methods Paul Counlonvaux, Johan G. Dewit, Cary Donald Olson, Thomas Miller, Marty Barris +3 more 2023-06-20
11185810 Air filter having fluted filter media Larry R. Nepsund, Bradley Kuempel, Bruce Allen Boehrs, Sheldon Anderson, Richard L. Bucholtz +1 more 2021-11-30
11123673 Filter arrangements; housings; assemblies; and, methods Paul Coulonvaux, Johan G. Dewit, Cary Donald Olson, Thomas Miller, Marty Barris +3 more 2021-09-21
10556202 Air filter having fluted filter media Larry R. Nepsund, Bradley Kuempel, Bruce Allen Boehrs, Sheldon Anderson, Richard L. Bucholtz +1 more 2020-02-11
10343101 Filter arrangements; housings; assemblies; and, methods Paul Coulonvaux, Johan G. Dewit, Cary Donald Olson, Thomas Miller, Marty Barris +3 more 2019-07-09
10252206 Filter arrangements; housings; assemblies; and, methods Paul Coulonvaux, Johan G. Dewit, Cary Donald Olson, Thomas Miller, Marty Barris +3 more 2019-04-09
9782713 Air filter having fluted filter media Larry R. Nepsund, Bradley Kuempel, Bruce Allen Boehrs, Sheldon Anderson, Richard L. Bucholtz +1 more 2017-10-10
9283507 Filter arrangements; housings; assemblies; and, methods Paul Coulonvaux, Johan G. Dewit, Cary Donald Olson, Thomas Miller, Marty Barris +3 more 2016-03-15
9162172 Air filter having fluted filter media Larry R. Nepsund, Bradley Kuempel, Bruce Allen Boehrs, Sheldon Anderson, Richard L. Bucholtz +1 more 2015-10-20
8641795 Filter arrangements; housing; assemblies; and, methods Paul Coulonvaux, Johan G. Dewit, Cary Donald Olson, Thomas Miller, Marty Barris +3 more 2014-02-04
8562707 Air filter having fluted filter media Larry R. Nepsund, Bradley Kuempel, Bruce Allen Boehrs, Sheldon Anderson, Richard L. Bucholtz +1 more 2013-10-22
8343245 Filter arrangements; housings; assemblies; and, methods Paul Coulonvaux, Johan G. Dewit, Cary Donald Olson, Thomas Miller, Marty Barris +3 more 2013-01-01
8206479 Air filter having fluted filter media Larry R. Nepsund, Bradley Kuempel, Bruce Allen Boehrs, Sheldon Anderson, Richard L. Bucholtz +1 more 2012-06-26
7981183 Filter arrangements; side-entry housings; and methods Larry R. Nepsund, Bradley Kuempel, Bruce Allen Boehrs, Sheldon Anderson, Richard L. Bucholtz +2 more 2011-07-19
7905936 Filter arrangements; housing; assemblies; and, methods Paul Coulonvaux, Johan G. Dewit, Cary Donald Olson, Thomas Miller, Marty Barris +3 more 2011-03-15
7655074 Filter arrangements; side-entry housings; and methods Larry R. Nepsund, Bradley Kuempel, Bruce Allen Boehrs, Sheldon Anderson, Richard L. Bucholtz +2 more 2010-02-02
7635403 Air filter having fluted filter media Larry R. Nepsund, Bradley Kuempel, Bruce Allen Boehrs, Sheldon Anderson, Richard L. Bucholtz +1 more 2009-12-22
7455707 Reverse flow air filter arrangement and method Don Harold, Dolan Bartels, John R. Hacker, Bruce Crenshaw 2008-11-25
7396375 Air filter having fluted filter media Larry R. Nepsund, Bradley Kuempel, Bruce Allen Boehrs, Sheldon Anderson, Richard L. Bucholtz +1 more 2008-07-08
6521009 Reverse flow air filter arrangement and method Dolan Bartels, John R. Hacker, Bruce Crenshaw, Don Harold 2003-02-18
6413289 Reverse flow air filter arrangement Dolan Bartels, John R. Hacker, Bruce Crenshaw, Don Harold 2002-07-02
6322602 Reverse flow air filter arrangement Dolan Bartels, John R. Hacker, Bruce Crenshaw, Don Harold 2001-11-27
6258145 Reverse flow air filter arrangement Dolan Bartels, John R. Hacker, Bruce Crenshaw, Don Harold 2001-07-10
D425977 Inside surface of a filter element having insert construction Dolan Bartels, John R. Hacker, Bruce Crenshaw, Don Harold 2000-05-30
6004366 Reverse flow air filter arrangement and method Dolan Bartels, John R. Hacker, Bruce Crenshaw, Don Harold 1999-12-21