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Class Information
Number: 342/46
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Radar transponder system > Navigational
Description: Subject matter wherein the transponder system is used to direct a vehicle to an intended destination.

Sub-classes under this class:

Class Number Class Name Patents
342/47 Distance measuring equipment (dme) 96

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
5367303 Parallel observer spatial evaluator Nov. 22, 1994
5341140 Transponder system Aug. 23, 1994
5262784 System for monitoring aircraft position Nov. 16, 1993
5196855 Secondary surveillance radar system Mar. 23, 1993
5144315 System for accurately monitoring aircraft position during training exercises Sep. 1, 1992
5093844 Pulse-spacing decoder Mar. 3, 1992
5089822 Interrogation signal processor for air traffic control communications Feb. 18, 1992
5075694 Airborne surveillance method and system Dec. 24, 1991
4910526 Airborne surveillance method and system Mar. 20, 1990
4885588 Radar transponder Dec. 5, 1989
4856100 Reply rate limiting Aug. 8, 1989
4839656 Position determination and message transfer system employing satellites and stored terrain map Jun. 13, 1989
4668954 Aircraft position determining system May. 26, 1987
4628319 Navigation system Dec. 9, 1986
4533871 Range-enable information system for plural mobile objects Aug. 6, 1985
4401987 Ranging system having reduced recognition jitter Aug. 30, 1983
4398195 Method of and apparatus for guiding agricultural aircraft Aug. 9, 1983
4278975 Navigation-monitoring apparatus Jul. 14, 1981
4234924 Method of introducing a baseline measurement into electronic positioning apparatus Nov. 18, 1980
4231093 Method of returning to a last point in a path after a temporary discontinuance of an operation Oct. 28, 1980
4229737 Ranging system and method for determining the range of a vehicle from a plurality of reference points Oct. 21, 1980
4188629 Passive navigation system with frequency coding Feb. 12, 1980
4151525 Radio-electric system for locating a given object Apr. 24, 1979
4150377 Ranging system for guiding moving objects over equidistant tracks Apr. 17, 1979
4128835 Method and apparatus for measuring distance between an aircraft and a ground station Dec. 5, 1978
4107676 Trans-horizon navigation system Aug. 15, 1978
4104629 Marine radar interrogator-transponder target detection, identification, and range measurement system Aug. 1, 1978
4083047 Vehicle guidance system Apr. 4, 1978
4047171 Transponder Sep. 6, 1977
4031535 Multiple frequency navigation radar system Jun. 21, 1977
4011562 Single frequency radio ranging system Mar. 8, 1977
3943509 Navigation aiding systems with one-way ranging and two-way synchronization Mar. 9, 1976
3938146 Secure encoder for trilateralization locator utilizing very narrow acceptance periods Feb. 10, 1976

1 2 3

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