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Class Information
Number: 342/30
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Aircraft collision avoidance system (cas) > With transponder
Description: Subject matter including a radio signal receiver-transmitter to convey the radar signal.

Sub-classes under this class:

Class Number Class Name Patents
342/32 Included in secondary surveilance radar (ssr) or air traffic control radio beacon system (atcrbs) 124
342/31 Including synchronized clock 13

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
6784785 Duplex transmission in an electromagnetic transponder system Aug. 31, 2004
6768943 System and method using environment memory having signatures Jul. 27, 2004
6744396 Surveillance and collision avoidance system with compound symbols Jun. 1, 2004
6738012 Protecting commercial airliners from man portable missiles May. 18, 2004
6732022 Control system for air vehicle and corresponding method May. 4, 2004
6727842 Digital IF processor Apr. 27, 2004
6683562 Integrated surveillance display Jan. 27, 2004
6657578 Formation surveillance and collision avoidance Dec. 2, 2003
6646588 Midair collision avoidance system Nov. 11, 2003
6587069 Distributed power amplifier architecture for TCAS transmitter Jul. 1, 2003
6563453 Usage of second mode S address for TCAS broadcast interrogation messages May. 13, 2003
6545631 Integrated datalinks in a surveillance receiver Apr. 8, 2003
6531978 Midair collision avoidance system Mar. 11, 2003
6483454 Close formation aircraft collision avoidance Nov. 19, 2002
6483453 Method for reducing transmit power for traffic alert and collision avoidance systems and airborne collision avoidance systems Nov. 19, 2002
6476757 Secure I/P Nov. 5, 2002
6459411 Close/intra-formation positioning collision avoidance system and method Oct. 1, 2002
6433729 System and method for displaying vertical profile of intruding traffic in two dimensions Aug. 13, 2002
6430479 Methods, apparatus and computer program products for determining the vertical speed of an aircraft Aug. 6, 2002
6324448 Methods, apparatus and computer program products for determining the vertical speed of an aircraft Nov. 27, 2001
6313783 Transponder having directional antennas Nov. 6, 2001
6278396 Midair collision and avoidance system (MCAS) Aug. 21, 2001
6262679 Midair collision avoidance system Jul. 17, 2001
6252525 Anti-collision system Jun. 26, 2001
6240345 Integrity monitor for TCAS mutual suppression May. 29, 2001
6222480 Multifunction aircraft transponder Apr. 24, 2001
6208284 Radar augmented TCAS Mar. 27, 2001
6133867 Integrated air traffic management and collision avoidance system Oct. 17, 2000
5923293 Method and apparatus for accomplishing extended range TCAS using a dual bandwidth receiver Jul. 13, 1999
5889491 Calibration for pilot warning system Mar. 30, 1999
5712628 Digitally programmable radio modules for transponder systems Jan. 27, 1998
5703591 Aircraft N-number control system Dec. 30, 1997
5670961 Airport surface traffic control system Sep. 23, 1997
5596326 Secondary surveillance radar interrogation system using dual frequencies Jan. 21, 1997
5552788 Antenna arrangement and aircraft collision avoidance system Sep. 3, 1996
5528244 Processing for mode S signals suffering multipath distortion Jun. 18, 1996
5463398 Method and apparatus for multiple reply rejection when decoding transponder replay signals Oct. 31, 1995
5317316 Method of altitude track initialization in an aircraft tracking system May. 31, 1994
5264853 Method of reducing false tracks due to suppression pulse replies in an aircraft tracking system Nov. 23, 1993
5235336 Method of bearing determination utilizing a bottom antenna in an aircraft tracking system Aug. 10, 1993
5223847 Pilot warning system Jun. 29, 1993
5202684 System of an aircraft collision avoidance system for suppressing useless alarms Apr. 13, 1993
5157615 Aircraft traffic alert and collision avoidance device Oct. 20, 1992
5153836 Universal dynamic navigation, surveillance, emergency location, and collision avoidance system and method Oct. 6, 1992
5089822 Interrogation signal processor for air traffic control communications Feb. 18, 1992
4856100 Reply rate limiting Aug. 8, 1989
4853700 Indicating system for warning airspace or threatening aircraft in aircraft collision avoidance system Aug. 1, 1989
4839658 Process for en route aircraft conflict alert determination and prediction Jun. 13, 1989
4835537 Telemetry burst collision avoidance system May. 30, 1989
RE32368 Collision avoidance system for aircraft Mar. 10, 1987

1 2 3 4

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