Inventor
C. Raymond Cheng
Inventor
Madison, WI, US
Overview
Patents· 10 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 general26%
Y02TClimate change mitigation technologies related to transportation19%
B01DSeparation15%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests11%
B01FMixing, e.g. dissolving, emulsifying or dispersing7%
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof7%
G10KSound-producing devices7%
F02BInternal-combustion piston engines4%
Y10TTechnical subjects covered by former us classification4%
PatentTitleYear
7,533,520'Exhaust aftertreatment mixer with stamped muffler flange'20097,497,301'Tubular acoustic silencer'20097,377,954'Performance air filtration cartridge'20086,814,041'Multi-frequency engine intake resonator'20046,722,123'Exhaust aftertreatment device, including chemical mixing and acoustic effects'20046,712,869'Exhaust aftertreatment device with flow diffuser'20046,576,045'Multi-stage diesel particulate collector system with combined processes of inertial impaction, virtual impaction, and filtration'20036,540,816'Regenerable filter with localized and efficient heating'20035,693,918'Active exhaust silencer'19975,541,373'Active exhaust silencer'1996Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1996–1997Patents assigned to DIGISONIX INC (2)· patent assignee history
1996–2009Based in Madison, WI, US· patent location history
2003–2009Patents assigned to FLEETGUARD INC (8)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| FLEETGUARD INC | 8 | 2003–2009 |
| DIGISONIX INC | 2 | 1996–1997 |
Locations
| Location | Patents | Span |
|---|---|---|
| Madison, WI, US | 10 | 1996–2009 |