Communications: electrical – Vehicle position indication
Reexamination Certificate
2007-04-17
2007-04-17
Trieu, Van T. (Department: 2612)
Communications: electrical
Vehicle position indication
C340S539130, C340S539230, C340S932200
Reexamination Certificate
active
10944093
ABSTRACT:
A system and method for proximity control of a barrier comprises a stationary wireless signal receiving device and a mobile transmitting device. The wireless signal receiving device may monitor at least one transmitting device within a predetermined coverage area and may be a radio frequency receiver or a spread spectrum receiver located near the barrier. In one embodiment, the transmitter device emits a control signal that is received by the receiving device when the transmitter is within a reception range. In one embodiment, the control signal includes transmitter identification information, directional information and position information. In another embodiment, the barrier is closed only after a predetermined delay has lapsed.
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Tsui Gallen Ka Leung
Tsui Philip Y. W.
Crowell & Moring LLP
Trieu Van T.
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