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Browse by Category: Main > Communications
Class Information
Number: 367/102
Name: Communications, electrical: acoustic wave systems and devices > Echo systems > Distance or direction finding > Frequency modulation > Linear modulation (e.g., sawtooth)
Description: Subject matter in which the frequency increases or decreases repetitively at a constant rate between repetitions.










Patents under this class:

Patent Number Title Of Patent Date Issued
6678210 Frequency division beamforming for sonar arrays Jan. 13, 2004
6087981 Method for pulse compression with a stepped frequency waveform Jul. 11, 2000
6011754 Personal object detector with enhanced stereo imaging capability Jan. 4, 2000
5963509 Method and device for distance measurement Oct. 5, 1999
H1797 Linear frequency modulation apparatus and technique Jul. 6, 1999
5724313 Personal object detector Mar. 3, 1998
5298962 Pulse compression signal processor utilizing identical saw matched filters for both up and down chirps Mar. 29, 1994
5212490 Echo ranging system for detecting velocity and range of targets using composite doppler invariant-like transmissions with suppression of false targets May. 18, 1993
5212489 Echo ranging system for detecting velocity of targets using composite doppler invariant transmissions May. 18, 1993
4960329 Chirp pulse echo ranging apparatus Oct. 2, 1990
4926693 Contactless actuator piston proximity sensor May. 22, 1990
4812035 AM-FM laser radar Mar. 14, 1989
4674069 System for collecting and processing data relating to moving bodies Jun. 16, 1987
RE32252 Method of and apparatus for providing information as to the existence or position of objects Sep. 23, 1986
4613231 Laser range finder with non-linearity compensation Sep. 23, 1986
4472793 Data selector circuit with channel skipper for data acquisition system Sep. 18, 1984
4449209 Utilization of entire transmitted bandwidth in continuous transmission FM sonar May. 15, 1984
4398275 Linear frequency sweep generator for continuous transmission FM sonar Aug. 9, 1983
4310903 Method of and apparatus for providing information as to the existence or position of objects Jan. 12, 1982
4292678 Method of and apparatus for echo location of objects Sep. 29, 1981
4287578 Method for shaping and aiming narrow beams Sep. 1, 1981
4279019 Method and apparatus for delay analysis of energy transmitted through a medium Jul. 14, 1981
4275460 Real-time audio spectrum analyzer Jun. 23, 1981
4253166 Target location systems Feb. 24, 1981
4245220 Target location systems Jan. 13, 1981
4052977 Methods of and apparatus for ascertaining the characteristics of motion of inaccessible moving elements Oct. 11, 1977
4038612 Swept oscillator automatic linearizer Jul. 26, 1977
3997866 Acoustic bus passenger counter Dec. 14, 1976
3987403 Sensory aids for the blind Oct. 19, 1976
3939463 Acoustic transponder navigation system Feb. 17, 1976











 
 
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