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Ambient noise-reduction system
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Patent number 8,045,724
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Issue date Oct 25, 2011
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Wolfson Microelectronics plc
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Alastair Sibbald
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Noise canceler
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Patent number 5,590,206
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Issue date Dec 31, 1996
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Samsung Electronics Co., Ltd.
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Hyeong-keon An
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Noise canceler
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Patent number 5,406,149
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Issue date Apr 11, 1995
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Samsung Electronics Co., Ltd.
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Hyeong-keon An
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Earphoning
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Patent number 5,305,387
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Issue date Apr 19, 1994
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Bose Corporation
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Roman Sapiejewski
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Earphone device
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Patent number 5,276,740
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Issue date Jan 4, 1994
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Sony Corporation
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Kiyofumi Inanaga
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Active noise reduction system
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Patent number 4,985,925
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Issue date Jan 15, 1991
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Sensor Electronics, Inc.
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Edwin Langberg
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A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
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Active noise control
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Patent number 4,965,832
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Issue date Oct 23, 1990
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The General Electric Company, p.l.c.
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John W. Edwards
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Electronic attenuator
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Patent number 4,947,434
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Issue date Aug 7, 1990
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Daikin Industries, Ltd.
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Hiroyuki Ito
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B06 - GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
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Active noise control
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Patent number 4,876,722
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Issue date Oct 24, 1989
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The General Electric Company, p.l.c.
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Nicolaas M. J. Dekker
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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