Inventor
Keith D. Marsh
Inventor
St. Clair Shores, MI, US
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
F02Mprimary
F02MSupplying combustion engines in general with combustible mixtures or constituents thereof38%
Y10TTechnical subjects covered by former us classification25%
F02BInternal-combustion piston engines6%
F02DControlling combustion engines6%
F15BSystems acting by means of fluids in general6%
F16KValves6%
G05DSystems for controlling or regulating non-electric variables6%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests6%
PatentTitleYear
6,178,956'Automotive fluid control system with pressure balanced solenoid valve'20015,419,369'Solenoid operated pressure control valve'19954,917,150'Solenoid operated pressure control valve'19904,483,508'Gradient power valve assembly'19844,434,763'Apparatus and system for controlling the air-fuel ratio supplied to a combustion engine'19844,294,282'Apparatus and system for controlling the air-fuel ratio supplied to a combustion engine'19814,154,782'Altitude fuel control valve'19794,086,900'Variable position throttle stop and dashpot apparatus'1978Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1978–1984Patents assigned to COLT IND OPERATING CORP (5)· patent assignee history
1978–2001Based in St. Clair Shores, MI, US· patent location history
1990Patents assigned to COLT IND INC (1)· patent assignee history
1995Patents assigned to COLTEC IND INC (1)· patent assignee history
2001Patents assigned to BORGWARNER INC (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| COLT IND OPERATING CORP | 5 | 1978–1984 |
| BORGWARNER INC | 1 | 2001 |
| COLT IND INC | 1 | 1990 |
| COLTEC IND INC | 1 | 1995 |
Locations
| Location | Patents | Span |
|---|---|---|
| St. Clair Shores, MI, US | 8 | 1978–2001 |