Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Reexamination Certificate
2007-04-03
2007-04-03
Gagliardi, Albert (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
C250S348000, C340S942000, C340S901000
Reexamination Certificate
active
10522317
ABSTRACT:
The present invention concerns a device for detecting crossing of a horizontal land demarcation marker of a carriageway for motor vehicles, characterized in that it includes at least one box (2) to be placed under the vehicle and enclosing means for projecting two light beams (4, 6) onto the carriageway (8) in two distinct zones (10, 12) that do not overlap, and distinct means for picking up each of the two light beams (14, 16) after reflection onto the carriageway (8).
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International Search Report, completed Oct. 27, 2003.
Hirt Andreas
Willemin Michel
EM Microelectronic-Marin SA
Gagliardi Albert
Griffin & Szipl, P.C.
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