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US Patent:"Spoken Language Identification System and Methods for Training and Operating Same", USA Provisional Patent No. 60/611,022, filed on Sept 17, 2004.
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US Patent: "Method and Apparatus for Voice Annotation and Retrieval of Multimedia Data", (Patent No: US 6,397,181 B1) granted on 28 May 2002.
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US Patent: "System for Chinese Tokenisation and Named Entity Recognition" (Patent No: US 6,311,152 B1) granted on 30 October 2001.
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US Patent: "Low data transmission rate and intelligible speech communication" (Patent No: US 6,502,073) granted on 31 December 2002.
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UK Patent: "Digital Audio Watermarking using content-adaptive multiple echo hopping" (Patent No. GB 2 363300 B) granted on Oct 1, 2003.