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August Kalin
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Bonstetten, CH
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last 30 patents
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Patent Grant
Hearing aid apparatus
Patent number
5,661,814
Issue date
Aug 26, 1997
Phonak AG
August Nazar Kalin
H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Patent Grant
Echo canceler
Patent number
5,633,863
Issue date
May 27, 1997
Siemens Schweiz AG
Peter Gysel
H04 - ELECTRIC COMMUNICATION TECHNIQUE