Resources Contact Us Home
Harbor radio navigation system

Image Number 6 for United States Patent #4071845.

A radio beacon navigation system wherein buoys placed at predetermined locations in a harbor or channel transmit identification signals. Every buoy is assigned a unique carrier frequency upon which is transmitted a signal capable of identifying the buoy. Each buoy is shown on harbor charts according to the unique properties of its signal. Radio receiving means carried aboard vessels navigating through the harbor or channel include means for determining the identity of the buoy from which signals are received and the direction from which the received signals emanate.

  Recently Added Patents
Vanilloid receptor ligands and use thereof for the production of pharmaceutical preparations
Image forming apparatus with an improved density adjustment unit
Fluorescent dyes, fluorescent dye kits, and methods of preparing labeled molecules
System and method for displaying relationships between electronically stored information to provide classification suggestions via inclusion
Support tray for server
Semiconductor power amplifier
Under bump passive components in wafer level packaging
  Randomly Featured Patents
Lithographic substrate and its process of manufacture
Methods and apparatus for high speed optical storage device
Multi-stand rolling mill of the longitudinal elongator kind for rod-shaped bodies, comprising four-rolls stands, and method for substituting the stands
Therapeutic treatment and prevention of infections with a bioactive materials encapsulated within a biodegradable-biocompatible polymeric matrix
Pressure injection machine and method
Heated grip for a bow handle
Roller skate carrier
Method for determining binocular balance and disorders of binocularity of an individual or clinical groups of individuals
Method for foliage and other plant material dye coloration preservation and topical seal coating