Inventor
LU DAOZHENG
US36 patents
⚠️ This page may combine multiple inventors who share the name “LU DAOZHENG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIELSEN A C CO
11 patentsUS5481294AJan 2, 1996
Audience measurement system utilizing ancillary codes and passive signatures
NIELSEN A C CO1,461 citations99
US5331544AJul 19, 1994
Market research method and system for collecting retail store and shopper market research data
NIELSEN A C CO443 citations99
US5031228AJul 9, 1991
Image recognition system and method
NIELSEN A C CO390 citations99
US4858000AAug 15, 1989
Image recognition audience measurement system and method
NIELSEN A C CO392 citations99
US4677466AJun 30, 1987
Broadcast program identification method and apparatus
NIELSEN A C CO1,206 citations99
US5550928AAug 27, 1996
Audience measurement system and method
NIELSEN A C CO615 citations98
US4697209ASep 29, 1987
Methods and apparatus for automatically identifying programs viewed or recorded
NIELSEN A C CO929 citations98
US4644509AFeb 17, 1987
Ultrasonic audience measurement system and method
NIELSEN A C CO158 citations98
US5594934AJan 14, 1997
Real time correlation meter
NIELSEN A C CO464 citations95
US5243423ASep 7, 1993
Spread spectrum digital data transmission over TV video
NIELSEN A C CO429 citations94
US5165069ANov 17, 1992
Method and system for non-invasively identifying the operational status of a VCR
NIELSEN A C CO96 citations94
NIELSEN CO US LLC
10 patentsUS7587728B2Sep 8, 2009
Methods and apparatus to monitor reception of programs and content by broadcast receivers
NIELSEN CO US LLC104 citations98
US7941816B2May 10, 2011
Detection of media links in broadcast signals
NIELSEN CO US LLC74 citations97
US7757248B2Jul 13, 2010
Detection of media links in broadcast signals
NIELSEN CO US LLC60 citations97
US7958526B2Jun 7, 2011
Source detection apparatus and method for audience measurement
NIELSEN CO US LLC34 citations96
US7672843B2Mar 2, 2010
Audio signature extraction and correlation
NIELSEN CO US LLC55 citations96
US7607147B1Oct 20, 2009
Interactive service device metering systems
NIELSEN CO US LLC41 citations96
US7742737B2Jun 22, 2010
Methods and apparatus for identifying a digital audio signal
NIELSEN CO US LLC26 citations92
US7644422B2Jan 5, 2010
Interactive service device metering systems
NIELSEN CO US LLC21 citations92
US7647605B2Jan 12, 2010
Coded/non-coded program audience measurement system
NIELSEN CO US LLC15 citations84
US7774807B2Aug 10, 2010
Source detection apparatus and method for audience measurement
NIELSEN CO US LLC6 citations73
NIELSEN MEDIA RES INC
8 patentsUS6647548B1Nov 11, 2003
Coded/non-coded program audience measurement system
NIELSEN MEDIA RES INC367 citations99
US7421723B2Sep 2, 2008
Detection of media links in broadcast signals
NIELSEN MEDIA RES INC232 citations98
US6675383B1Jan 6, 2004
Source detection apparatus and method for audience measurement
NIELSEN MEDIA RES INC249 citations98
US6513161B2Jan 28, 2003
Monitoring system for recording device
NIELSEN MEDIA RES INC106 citations98
US5771307AJun 23, 1998
Audience measurement system and method
NIELSEN MEDIA RES INC556 citations98
US5737025AApr 7, 1998
Co-channel transmission of program signals and ancillary signals
NIELSEN MEDIA RES INC261 citations97
US6467089B1Oct 15, 2002
Audience measurement system incorporating a mobile handset
NIELSEN MEDIA RES INC373 citations96
US5737026AApr 7, 1998
Video and data co-channel communication system
NIELSEN MEDIA RES INC118 citations95