Abstract: A child seat-vehicle safety system for a passenger vehicle, including at least one child seat buckle signaling device with a buckling detector for signaling the buckle status, and a portable controller device that attaches to the On-Board Diagnostic II (OBD-II) port of the vehicle, for detecting the status of the vehicle ignition system, receiving the buckle status signal, and generating an alarm signal in response to a predetermined condition of the ignition status and the buckle status signal. The system provides a method of warning a vehicle operator that a child has been left buckled in a vehicle after the vehicle's ignition system has been turned off, by generating an alarm signal when the ignition status is ‘off’ and the buckle status signal is ‘buckled’ beyond a predetermined grace or timeout period.

Abstract: A child seat-vehicle safety system for a passenger vehicle, including at least one child seat buckle signaling device with a buckling detector for signaling the buckle status, and a portable controller device that attaches to the On-Board Diagnostic II (OBD-II) port of the vehicle, for detecting the status of the vehicle ignition system, receiving the buckle status signal, and generating an alarm signal in response to a predetermined condition of the ignition status and the buckle status signal. The system provides a method of warning a vehicle operator that a child has been left buckled in a vehicle after the vehicle's ignition system has been turned off, by generating an alarm signal when the ignition status is ‘off’ and the buckle status signal is ‘buckled’ beyond a predetermined grace or timeout period.

Abstract: A child seat-vehicle safety system for a passenger vehicle, including at least one child seat buckle signaling device, which includes a buckling detector, and a buckling detector for signaling the buckle status, and a portable controller device that attaches to the On-Board Diagnostic II (OBD-II) port of the vehicle, for detecting the status of the vehicle ignition system, receiving the buckle status signal, and generating an alarm signal in response to a predetermined condition of the ignition status and the buckle status signal. The portable controller device also can include an alarm that is responsive to the alarm signal.

Abstract: A multifocal lens includes convex surface and a concave surface and is made of a single piece of polymeric material. The concave surface includes a near vision segment and a distant vision segment, and an area of demarcation between the near vision segment and the distant vision segment is visible.