Class 342/415 - Coded equi-signal (e.g., A and N type)

Subclass of Class 342 - Communications: directive radio wave systems and devices (e.g., radar, radio navigation)
Definition: Subject matter in which a beacon is caused to alternately
No. of patents: 3
Last issue date: 01/26/1988

Number	Title	Issue Date
4721899	Combined air-direct testing simulator Apparatus for applying a test static-electric discharge from a test tip to equipment under test in two modes, which apparatus includes a capacitor, a power supply, and a normally closed relay for connecting the high side of the capacitor to the tip. Means...	01/26/1988
4642647	Signal generator for radio navigation system An improved signal generator and method for radio navigation in accordance with systems of the type in which location is determined in accordance with radio fixings with respect to multiple points of reference, each of such points providing a coded transm...	02/10/1987
4298875	Aircraft collision avoidance system The system provides each equipped given aircraft with an indication of the presence of a similarly equipped intruder aircraft. Various zones are established about the given and intruder crafts and the indication provided tells each pilot when two of these...	11/03/1981

PatentStorm