Inventor
Donald F. Engel
Inventor
Prior Lake, MN, US
Overview
Patents· 34 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B01Dprimary
B01DSeparation52%
Y10TTechnical subjects covered by former us classification17%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof13%
F16LPipes7%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges2%
LOC232%
PatentTitleYear
11,123,673Filter arrangements; housings; assemblies; and, methods202110,556,202Air filter having fluted filter media202010,343,101Filter arrangements; housings; assemblies; and, methods201910,252,206Filter arrangements; housings; assemblies; and, methods20199,782,713'Air filter having fluted filter media'20179,283,507'Filter arrangements; housings; assemblies; and, methods'20169,162,172'Air filter having fluted filter media'20158,641,795'Filter arrangements; housing; assemblies; and, methods'20148,562,707'Air filter having fluted filter media'20138,343,245'Filter arrangements; housings; assemblies; and, methods'20138,206,479'Air filter having fluted filter media'20127,981,183'Filter arrangements; side-entry housings; and methods'20117,905,936'Filter arrangements; housing; assemblies; and, methods'20117,655,074'Filter arrangements; side-entry housings; and methods'20107,635,403'Air filter having fluted filter media'20097,455,707'Reverse flow air filter arrangement and method'20087,396,375'Air filter having fluted filter media'20086,521,009'Reverse flow air filter arrangement and method'20036,413,289'Reverse flow air filter arrangement'20026,322,602'Reverse flow air filter arrangement'20016,258,145'Reverse flow air filter arrangement'2001D0425977'Inside surface of a filter element having insert construction'20006,004,366'Reverse flow air filter arrangement and method'19995,938,804'Reverse flow air filter arrangement and method'19995,897,676'Reverse flow air filter arrangement and method'19995,690,712'Reverse flow air filter arrangement and method'19975,613,992'Reverse flow air filter arrangement and method'19975,137,308'Air transfer system'19925,129,685'Connector system for air transfer ducts'19925,123,795'Quarter turn fastener'19924,974,881'Air transfer system'19904,856,826'Air transfer system'19894,720,292'Cylindrical air filter with lightweight housing and radially directed seal'19884,699,639'Air-intake, moisture-eliminator duct apparatus'1987Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1987–2021Patents assigned to DONALDSON CO INC (34)· patent assignee history
1987–2021Based in Prior Lake, MN, US· patent location history
2012–2013Patents assigned to ENGEL DONALD F (3)· patent assignee history
2012–2013Patents assigned to ANDERSON SHELDON (2)· patent assignee history
2012–2013Patents assigned to BOEHRS BRUCE ALLEN (2)· patent assignee history
2012–2013Patents assigned to BUCHOLTZ RICHARD L (2)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DONALDSON CO INC | 34 | 1987–2021 |
| ENGEL DONALD Fself | 3 | 2012–2013 |
| ANDERSON SHELDON | 2 | 2012–2013 |
| BOEHRS BRUCE ALLEN | 2 | 2012–2013 |
| BUCHOLTZ RICHARD L | 2 | 2012–2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Prior Lake, Minnesota, US | 34 | 1987–2021 |