Inventor
John T. Herman
Inventor
Dellwood, MN, US
Overview
Patents· 27 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B01Dprimary
B01DSeparation27%
F01NGas-flow silencers or exhaust apparatus for machines or engines in general20%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof18%
F16LPipes9%
Y10TTechnical subjects covered by former us classification7%
B04BCentrifuges5%
Y02TClimate change mitigation technologies related to transportation4%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests4%
A61BDiagnosis2%
A61FFilters implantable into blood vessels2%
PatentTitleYear
11,064,985Tissue plug20218,844,270'Diesel particulate filter regeneration system including shore station'20148,769,938'Exhaust treatment device with electric regeneration system'20148,256,060'Apparatus for cleaning exhaust aftertreatment devices and methods'20128,117,832'Exhaust treatment device with electric regeneration system'20127,410,530'Apparatus for cleaning exhaust aftertreatment devices and methods'20087,294,162'Exhaust filter'20076,508,277'Flexible pipe with compressed ends'20036,311,736'Flexible hose and method for manufacturing'20016,305,054'Exhaust system clamp'20016,234,541'U-bolt clamp for sealing lap joints'2001D0436028'U-bolt clamp'20016,123,369'Pipe lap joint and methods'20006,019,809'Filtration arrangement'20005,800,587'Filtration arrangement and method'19985,792,227'Filtration arrangement'19985,762,669'Filtration arrangement'19985,762,670'Filtration arrangement'19985,622,537'Filtration arrangement'19975,423,892'Filtration arrangement'19955,364,456'Filtration arrangement and method'19945,246,472'Apparatus for filtering engine exhaust'19935,238,474'Filtration arrangement'19935,082,476'Filtration arrangement and method'19924,406,651'Multi-phase self purging centrifuge'19834,366,069'Coolant recovery system'19824,350,282'Self-purging centrifuge'1982Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1982–2014Patents assigned to DONALDSON CO INC (26)· patent assignee history
1982–1983Based in Mahtomedi, MN, US· patent location history
1992–2003Based in Dellwood, MN, US· patent location history
2007–2014Based in Rhinelander, WI, US· patent location history
2012–2014Patents assigned to HERMAN JOHN T (4)· patent assignee history
2012–2014Patents assigned to LORENZEN MARY J (3)· patent assignee history
2012–2014Patents assigned to WAGNER WAYNE M (3)· patent assignee history
2012–2014Patents assigned to ZHANG WENZHONG (3)· patent assignee history
2021Based in Elkton, MD, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DONALDSON CO INC | 26 | 1982–2014 |
| HERMAN JOHN Tself | 4 | 2012–2014 |
| LORENZEN MARY J | 3 | 2012–2014 |
| WAGNER WAYNE M | 3 | 2012–2014 |
| ZHANG WENZHONG | 3 | 2012–2014 |
Locations
| Location | Patents | Span |
|---|---|---|
| Dellwood, Minnesota, US | 17 | 1992–2003 |
| Rhinelander, WI, US | 6 | 2007–2014 |
| Mahtomedi, Minnesota, US | 3 | 1982–1983 |
| Elkton, Maryland, US | 1 | 2021 |