Resources Contact Us Home
Browse by Category: Main > Communications
Class Information
Number: 342/415
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > With transmisson of bearing or position determinative signals > Fixed course or bearing indicating > Distinctive frequencies equi-signal type > Coded equi-signal (e.g., a and n type)
Description: Subject matter in which a beacon is caused to alternately radiate in accordance with either one of two fixed angularly disposed directional patterns with the alternations being so timed that the radiation is each pattern is interrupted in accordance with a code which is distinctive with that pattern.

Patents under this class:

Patent Number Title Of Patent Date Issued
7636620 Signal distribution device operating in aircraft instrumental landing systems Dec. 22, 2009
4721899 Combined air-direct testing simulator Jan. 26, 1988
4642647 Signal generator for radio navigation system Feb. 10, 1987
4298875 Aircraft collision avoidance system Nov. 3, 1981

  Recently Added Patents
Base station apparatus and method for use in mobile communication system
Method and apparatus for over-the-air activation of neighborhood cordless-type services
Wafer-level chip scale package
Process for filtering interferograms obtained from SAR images acquired on the same area
Preventative traffic congestion social networking improvement system within a community
Vehicle wheel
High frequency vertical spring probe
  Randomly Featured Patents
Medical retrieval device
Relay apparatus for relatively rotatable members
Method and system for processing the booth encoding 33.sup.RD term
Method of loading expandable medical device in a low vapor environment
Through-counter dispensing system for plastic bags
Target camouflaging chaff dispenser with ejectable closure
Vacuum breaker valve and stem packing assembly
System on chip with reconfigurable SRAM
Process for scale control using mixtures of polycationic and polyanionic polymers
Battery strip dispenser