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LU DAOZHENG

US3 patents

Top patents by PatentIndex Score

US5432864AJul 11, 1995

Identification card verification system

LU DAOZHENG496 citations94

US8776103B2Jul 8, 2014

Interactive service device metering systems

LU DAOZHENG14 citations91

US8732738B2May 20, 2014

Audience measurement systems and methods for digital television

LU DAOZHENG9 citations82