Resources Contact Us Home
School bus locator system

Image Number 2 for United States Patent #5144301.

A system for alerting school children that a school bus is moving toward a nearby bus stop, thus prompting the children to leave their residences to reach the bus stop at or before the bus arrives at the stop. The system includes a radio transmitter on the bus and a radio receiver in each home along the bus route. Each receiver has a first warning light that begins to emit a signal when the school bus is a relatively great distance away from the home, and a second sound-emitting speaker that begins to emit an audible signal when the school bus is a relatively short distance away from the home, e.g. one quarter mile.

  Recently Added Patents
Methods and compositions for improved F-18 labeling of proteins, peptides and other molecules
Emergency whistle, flashlight, and compass
Liquid crystal display panel
Method of controlling semiconductor device, signal processing method, semiconductor device, and electronic apparatus
Stable light source device
Non-intrusive processor tracing
  Randomly Featured Patents
Inductively-coupled signalling system
Channel quality feedback mechanism and method
Elbow casing for fluid flow machines
Reconfigurable datapath for processor debug functions
Telescopic gun sight
Computer system sleep/awake circuit
Radio frequency power amplifier module
Moisture-permeable waterproof fabric, and moisture permeable resin film backed with release paper to be used for the production of the fabric
Centering bushing for centering material bars