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Adaptive personal active noise system
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Patent number 6,078,672
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Issue date Jun 20, 2000
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Virginia Tech Intellectual Properties, Inc.
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William Richard Saunders
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Active headset
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Patent number 6,069,959
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Issue date May 30, 2000
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Noise Cancellation Technologies, Inc.
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Owen Jones
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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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Noise cancellation apparatus
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Patent number 4,025,724
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Issue date May 24, 1977
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Westinghouse Electric Corporation
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Allen R. Davidson
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G10 - MUSICAL INSTRUMENTS ACOUSTICS
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2776020
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Patent number 2,776,020
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Issue date Jan 1, 1957
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G10 - MUSICAL INSTRUMENTS ACOUSTICS