Inventor
Douglas E. Flemming
Inventor
Rosemount, MN, US
Overview
Patents· 12 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F01Nprimary
F01NGas-flow silencers or exhaust apparatus for machines or engines in general32%
F02BInternal-combustion piston engines32%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests12%
H05BElectric heating6%
Y02TClimate change mitigation technologies related to transportation6%
F16HGearing3%
F16LPipes3%
H02KDynamo-electric machines3%
Y10TTechnical subjects covered by former us classification3%
PatentTitleYear
6,892,854'Muffler with catalytic converter arrangement; and method'20056,550,573'Muffler with catalytic converter arrangement, and method'20035,828,013'Muffler with catalytic converter arrangement; and method'19985,426,269'Muffler with catalytic converter arrangement; and method'19955,355,973'Muffler with catalytic converter arrangement; and method'19945,101,095'Diesel engine gas filter with electrical heater'19925,053,603'Electrical resistance heater'19914,899,540'Muffler apparatus with filter trap and method of use'19904,878,928'Apparatus for increasing regenerative filter heating element temperature'19894,851,015'Muffler apparatus with filter trap and method of use'19894,832,661'Apparatus and method for maintaining alternator output above predetermined levels'19894,790,574'Apparatus for coupling tubular members'1988Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1988–2005Patents assigned to DONALDSON CO INC (12)· patent assignee history
1988–2005Based in Rosemount, MN, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DONALDSON CO INC | 12 | 1988–2005 |
Locations
| Location | Patents | Span |
|---|---|---|
| Rosemount, Minnesota, US | 12 | 1988–2005 |