Fengguang Zhao

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Shanghai, CN

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Patents Grantslast 30 patents

Information Patent Grant
Bit based arithmetic coding using variable size key cipher
- Patent number 7,664,267
- Issue date Feb 16, 2010
- Agere Systems Inc.
- Chenggang Duan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Automatic pronunciation scoring for language learning
- Patent number 7,219,059
- Issue date May 15, 2007
- Lucent Technologies Inc.
- Sunil K. Gupta
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Multiplication-free arithmetic coding
- Patent number 6,259,388
- Issue date Jul 10, 2001
- Lucent Technologies Inc.
- Fengguang Zhao
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
Variable size key cipher and method and device using the same
- Publication number 20050254646
- Publication date Nov 17, 2005
- Chenggang Duan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Automatic pronunciation scoring for language learning
- Publication number 20040006468
- Publication date Jan 8, 2004
- LUCENT TECHNOLOGIES INC.
- Sunil K. Gupta
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Application
Variable size key cipher and method and device using the same
- Publication number 20020094080
- Publication date Jul 18, 2002
- Chenggang Duan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE