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Class Information
Number: 367/1
Name: Communications, electrical: acoustic wave systems and devices > Sonar counter-measures
Description: Subject matter comprising decoys or jamming systems for rendering nonseismic echo systems or distance or direction finding systems ineffective.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8614578 Attenuation of electromagnetic signals passing through conductive material Dec. 24, 2013
8320214 Device for reducing target strength of an underwater object Nov. 27, 2012
7623409 Array plate apparatus having tunable isolation characteristics Nov. 24, 2009
7596054 Suppressed feature waveform for modulated sonar transmission Sep. 29, 2009
7263028 Composite acoustic attenuation materials Aug. 28, 2007
7257048 Countermeasure system and method to emulate target with spatial extent Aug. 14, 2007
7219612 Naval ship decoy May. 22, 2007
7218571 Magnetically driven underwater pulse generator May. 15, 2007
7020044 Apparatus for producing gaseous vapor baffle Mar. 28, 2006
6934217 Countermeasure threat emulator and method Aug. 23, 2005
6744694 Gaseous cavity for forward-looking sonar quieting Jun. 1, 2004
6600694 Digital signal processor based torpedo counter-measure Jul. 29, 2003
6567341 Boom system and its use to attenuate underwater sound or shock wave transmission May. 20, 2003
6547733 Ultrasound imaging apparatus and method using Golay codes with orthogonal property Apr. 15, 2003
6542109 Autonomous off-board defensive aids system Apr. 1, 2003
6496447 Target simulation system Dec. 17, 2002
6473364 High frequency acoustic float for the versatile mine system Oct. 29, 2002
6442104 Underwater background-acoustics synthesizer system and method Aug. 27, 2002
6381196 Sintered viscoelastic particle vibration damping treatment Apr. 30, 2002
6341101 Launchable countermeasure device and method Jan. 22, 2002
6256263 Acoustic sensing countermeasure device and method of determining a threat direction Jul. 3, 2001
6252822 Countermeasure device with air bag hover system and pressure compensated acoustic projectors Jun. 26, 2001
6222794 Underwater noise generator actuated by magneto-inductive/acoustic signals Apr. 24, 2001
6185156 Underwater acoustic impulse source Feb. 6, 2001
6069840 Mechanically coupled helmholtz resonators for broadband acoustic attenuation May. 30, 2000
6052332 Countermeasure flexible line array Apr. 18, 2000
5999491 Low frequency underwater sound source Dec. 7, 1999
5949738 Sonar target simulation Sep. 7, 1999
5822271 Submarine portable very low frequency acoustic augmentation system Oct. 13, 1998
5787048 Ship wake signature suppression Jul. 28, 1998
5777947 Apparatuses and methods for sound absorption using hollow beads loosely contained in an enclosure Jul. 7, 1998
5754491 Multi-technology acoustic energy barrier and absorber May. 19, 1998
5745434 Acoustic absorption or damping material with integral viscous damping Apr. 28, 1998
5721711 Apparatus and method for producing inverse bubbles Feb. 24, 1998
5712805 Noise diagnostic system Jan. 27, 1998
5706249 Panel spacer with acoustic and vibration damping Jan. 6, 1998
5689474 Digital frequency synthesizer Nov. 18, 1997
5635662 Method and apparatus for avoiding detection by a threat projectile Jun. 3, 1997
5526324 Acoustic absorption and damping material with piezoelectric energy dissipation Jun. 11, 1996
5513149 Sound damping arrangement Apr. 30, 1996
5444668 Anechoic and decoupling coating Aug. 22, 1995
5420825 Noise control composite May. 30, 1995
5408439 Monolithic construction of waveguide tubes Apr. 18, 1995
5400296 Acoustic attenuation and vibration damping materials Mar. 21, 1995
5394376 Method and apparatus for acoustic attenuation Feb. 28, 1995
5381381 Far field acoustic radiation reduction Jan. 10, 1995
5365490 Method and system for reducing drag on a body moving through a fluid medium Nov. 15, 1994
5359574 Electromagnetically activated compliant wavy-wall Oct. 25, 1994
5341343 Underwater explosive acoustic signature device Aug. 23, 1994
5337288 Acoustic and vibration attenuation composite material Aug. 9, 1994

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