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
Method and structure for forming ETSOI capacitors, diodes, resistors and back gate contacts
Binary-to-gray converting circuits and gray code counter including the same
Media processing method and device
Subband SNR correction in a frequency selective scheduler
MEMS autofocus actuator
Techniques for determining optimized local repair paths
Modular microscope construction
  Randomly Featured Patents
Cosmetic composition
Variable position acetabular cup
Free-standing bike stand
Electromagnetic coupler for use with a telephone set
Cell based data transmission method
Ink jet recording head, ink jet recording apparatus, and information processing system
Portable device and control method thereof
Multiphase clock generator
Cavity reflector light injection for flat panel displays
Fault tolerant control for a refrigerator