|
US2014282640A1
|
|
Methods and systems for reducing crediting errors due to spillover using audio codes and/or signatures
|
|
US2014270195A1
|
|
Methods and systems for reducing spillover by analyzing sound pressure levels
|
|
US2014259039A1
|
|
Methods and systems for reducing spillover by detecting signal distortion
|
|
US2014250448A1
|
|
Methods and systems for reducing spillover by measuring a crest factor
|
|
US2014240092A1
|
|
Systems and methods for identifying a user of an electronic device
|
|
US2014211952A1
|
|
Methods and apparatus to collect media identifying data
|
|
US2013227595A1
|
|
Methods and apparatus to identify audience members
|
|
US2013156273A1
|
|
Methods and apparatus to capture images
|
|
US2010169908A1
|
|
Methods and apparatus to enforce a power off state of an audience measurement device during shipping
|
|
US2010169909A1
|
|
Methods and apparatus to enforce a power off state of an audience measurement device during shipping
|
|
US2010077420A1
|
|
Methods and apparatus to detect carrying of a portable audience measurement device
|
