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Class Information
Number: 342/43
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Radar transponder system > Combined with primary radar system
Description: Subject matter wherein the transponder system is combined with a system in which the retransmitted (reply) signal is a reflection of the transmitted energy from the surface of the target.

Patents under this class:
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Patent Number Title Of Patent Date Issued
8552903 Verified distance ranging Oct. 8, 2013
8432253 Zone determination by combining signal strength with topological factors Apr. 30, 2013
8390505 Process and a device for detecting aircrafts circulating in an air space surrounding an airplane Mar. 5, 2013
8279109 Aircraft bird strike avoidance method and apparatus using transponder Oct. 2, 2012
8149154 System, method, and software for performing dual hysteresis target association Apr. 3, 2012
8120525 Systems and methods for obtaining aircraft state data from multiple data links Feb. 21, 2012
7956796 Detecting device and railroad vehicle Jun. 7, 2011
7952512 Mobile device enabled radar tags May. 31, 2011
7889114 Radar target processing reduction systems and methods using cooperative surveillance sources Feb. 15, 2011
7847722 Secondary surveillance radar and method of analyzing replies for secondary surveillance radar Dec. 7, 2010
7817079 System and method for collection of global AIS and radar track information Oct. 19, 2010
7786923 Interrogator of communication system Aug. 31, 2010
7777666 Celestial body mapping systems and methods Aug. 17, 2010
7660668 Method and device for controlling at least one deceleration device and/or an output-determining actuating element of a vehicle drive device Feb. 9, 2010
7612708 RF system for tracking objects Nov. 3, 2009
7598905 Systems and methods for monitoring transponder performance Oct. 6, 2009
7567203 Classification system for radar and sonar applications Jul. 28, 2009
7504992 Wireless system using continuous wave phase measurement for high-precision distance measurement Mar. 17, 2009
7492307 Collision risk prevention equipment for aircraft Feb. 17, 2009
7486226 Device and a method for accurate radar level gauging Feb. 3, 2009
7479884 System and method for monitoring objects, people, animals or places Jan. 20, 2009
7479919 Surface vehicle transponder Jan. 20, 2009
7471235 Mode S transponder transmission signal decoder and mode S transponder transmission signal decoding method Dec. 30, 2008
7460059 Removing interfering clutter associated with radar pulses that an airborne radar receives from a radar transponder Dec. 2, 2008
7372398 Electronic target position control at millimeter wave for hardware-in-the-loop applications May. 13, 2008
7327306 RF system for tracking objects Feb. 5, 2008
7292822 Wireless communication system using surface acoustic wave (SAW) second harmonic techniques Nov. 6, 2007
7218273 Method and device for boresighting an antenna on a moving platform using a moving target May. 15, 2007
7209071 System and method for distance measurement Apr. 24, 2007
7196654 Vehicle positioning and tracking radar system Mar. 27, 2007
7164380 Interrogator and goods management system adopting the same Jan. 16, 2007
7121502 Pseudo GPS aided multiple projectile bistatic guidance Oct. 17, 2006
7119736 Transponder system and method for measurement of separation Oct. 10, 2006
7015856 Device and method for SPR detection in a Mode-S transponder Mar. 21, 2006
6985103 Passive airborne collision warning device and method Jan. 10, 2006
6861971 Transponder having high phase stability, particularly for synthetic aperture radar, or sar, systems Mar. 1, 2005
6842138 Target designation system Jan. 11, 2005
6825794 Wireless communication system using surface acoustic wave (SAW) second harmonic techniques Nov. 30, 2004
6825795 Transponder lock Nov. 30, 2004
6791489 Radio tag for LFM radar Sep. 14, 2004
6778128 Method of locating underground utility lines and an underground utility line Aug. 17, 2004
6768465 Low probability of intercept (LPI) millimeter wave beacon Jul. 27, 2004
6762710 Target designation system Jul. 13, 2004
6747594 Calibration of differential frequency-dependent characteristics of a radio communications system Jun. 8, 2004
6745008 Multi-frequency communication system and method Jun. 1, 2004
6693581 Device for transmitting data in a motor vehicle Feb. 17, 2004
6650277 Target designation system Nov. 18, 2003
6630900 Process for carrying out a non-contact remote interrogation Oct. 7, 2003
6614385 Police activity transponder utilizing a vehicle interface Sep. 2, 2003
6611224 Backscatter transponder interrogation device Aug. 26, 2003

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