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Class Information
Number: 342/436
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > Direction-finding receiver only > With plural fixed antenna pattern comparing > Successively commutated > By modulation
Description: Subject matter wherein commutation is effected by varying the amplitude, frequency, or phase of a wave by impressing one wave on another wave of constant properties.










Patents under this class:

Patent Number Title Of Patent Date Issued
8525728 Method of detecting object in the vicinity of a vehicle Sep. 3, 2013
8279117 Burst optimized tracking algorithm Oct. 2, 2012
6859801 Efficient memoryless protocol for tag identification Feb. 22, 2005
6416093 Energy absorption, rotation and redirection system for use with racing vehicles and a surrounding barrier Jul. 9, 2002
5922036 Lane detection sensor and navigation system employing the same Jul. 13, 1999
5815113 Monolithic, low-noise, synchronous direct detection receiver for passive microwave/millimeter-wave radiometric imaging systems Sep. 29, 1998
5635941 Method and apparatus for feeding over-modulated message signals to antennas of an antenna array Jun. 3, 1997
5572427 Doppler position bearing angle locator Nov. 5, 1996
4954835 Radiodirection finding method and apparatus using doppler effect frequency modulation Sep. 4, 1990
4306240 Bearing measuring system for frequency modulation Dec. 15, 1981
4302759 Radio direction finder Nov. 24, 1981
4263597 Nondisruptive ADF system Apr. 21, 1981
4135191 Coherent demodulator Jan. 16, 1979
4050072 Signal combining apparatus Sep. 20, 1977
4025924 Mobile direction comparator May. 24, 1977
3967280 Direction finding system with integrated loop and sense antenna assembly Jun. 29, 1976











 
 
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