Inventor
Herve M. Lefebvre
Inventor
Chartres, FR
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling38%
F04FPumping of fluid by direct contact of another fluid or by using inertia of fluid to be pumped38%
G02BOptical elements, systems or apparatus13%
H01HElectric switches13%
PatentTitleYear
7,613,378'Optical device comprising an optical component and an optical medium with different refractive indices'20095,493,091'High voltage circuit breaker contact structure including ionization slot and secondary arcing features'19964,518,036'Device for controlling a safety valve disposed below an activation pump in a hydrocarbon production well'19854,474,234'Safety valve installed below an activation pump in a hydrocarbon production well'19844,444,251'Combined installation comprising an activation pump and a safety valve disposed below this pump, in a hydrocarbon production well'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984–1985Patents assigned to PETROLES CIE FRANCAISE (3)· patent assignee history
1984–1985Based in Chartres, FR· patent location history
1996Patents assigned to SCHNEIDER ELECTRIC SA (1)· patent assignee history
1996Based in Carrieres sur Seine, FR· patent location history
2009Patents assigned to CIT ALCATEL (1)· patent assignee history
2009Based in Viroflay, FR· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| PETROLES CIE FRANCAISE | 3 | 1984–1985 |
| CIT ALCATEL | 1 | 2009 |
| SCHNEIDER ELECTRIC SA | 1 | 1996 |
Locations
| Location | Patents | Span |
|---|---|---|
| Chartres, FR | 3 | 1984–1985 |
| Viroflay, FR | 1 | 2009 |
| Carrieres sur Seine, FR | 1 | 1996 |